Check if gamemode is null because of fake player npcs

plugin.yml

@@ -1,6 +1,6 @@
 name: ActionHealth
 main: com.zeshanaslam.actionhealth.Main
-version: 3.2.0
+version: 3.2.1
 commands:
   Actionhealth:
     description: Actionhealth main command.

src/com/zeshanaslam/actionhealth/HealthUtil.java

@@ -38,8 +38,8 @@ public class HealthUtil {
             if (entity instanceof Player) {
                 Player player = (Player) entity;
 
-                // Using string version for older versions
-                if (player.getGameMode().name().equals("SPECTATOR")) {
+                // Using string version for older versions. Checking for gamemode is null because of fake player npcs.
+                if (player.getGameMode() != null && player.getGameMode().name().equals("SPECTATOR")) {
                     return;
                 }
             }