fix joining from other arenas (hopefully), readd missing block destroy check

src/com/garbagemule/MobArena/ArenaListener.java

@@ -168,12 +168,15 @@ public class ArenaListener
         if (!arena.isRunning())
             return false;
         // Below this, arena is running - ACStache
+
+        Block b = event.getBlock();
+        if (arena.removeBlock(b) || b.getType() == Material.TNT)
+            return true;
         
         if (softRestore) {
             if (arena.isProtected())
                 return false;
             
-            Block b = event.getBlock();
             BlockState state = b.getState();
             Repairable r = null;
             
@@ -188,7 +191,7 @@ public class ArenaListener
 
             arena.addRepairable(r);
             
-            if(!softRestoreDrops)
+            if (!softRestoreDrops)
                 b.setTypeId(0);
             return true;
         }

src/com/garbagemule/MobArena/commands/user/JoinCommand.java

@@ -34,6 +34,12 @@ public class JoinCommand implements Command
             return false;
         }
         
+        // Deny joining from other arenas
+        if (am.getArenaWithPlayer(p) != null) {
+            Messenger.tellPlayer(p, Msg.JOIN_ALREADY_PLAYING);
+            return false;
+        }
+        
         // Per-arena sanity checks
         if (!arena.canJoin(p)) {
             return false;

src/com/garbagemule/MobArena/util/ItemParser.java

@@ -149,7 +149,7 @@ public class ItemParser
     }
     
     private static ItemStack withDataAndAmount(String item, String data, String amount) {
-        Material m = getMaterial(item.toUpperCase());
+        Material m = getMaterial(item);
         short    d = getData(data, m);
         int      a = getAmount(amount);