Fix NPE in /back when no previous location exists

Essentials/src/com/earth2me/essentials/commands/Commandback.java

@@ -16,6 +16,10 @@ public class Commandback extends EssentialsCommand
 	@Override
 	protected void run(final Server server, final User user, final String commandLabel, final String[] args) throws Exception
 	{
+		if (user.getLastLocation() == null)
+		{
+			throw new Exception(_("noLocationFound"));
+		}
 		if (user.getWorld() != user.getLastLocation().getWorld() && ess.getSettings().isWorldTeleportPermissions()
 			&& !user.isAuthorized("essentials.worlds." + user.getLastLocation().getWorld().getName()))
 		{

Essentials/src/messages.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_cs.properties

@@ -528,3 +528,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_da.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_de.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_en.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_es.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_fi.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_fr.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_it.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_nl.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_pl.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_pt.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_ro.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_ru.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_sv.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_zh.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_zh_HK.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.

Essentials/src/messages_zh_TW.properties

@@ -523,3 +523,4 @@ radiusTooBig=\u00a74Radius is too big\! Maximum radius is {0}.
 isIpBanned=\u00a76IP \u00a7c{0} \u00a76is banned.
 mobDataList=\u00a76Valid mob data\:\u00a7r {0}
 vanish=\u00a76Vanish for {0}\u00a76\: {1}
+noLocationFound=\u00a74No valid location found.