Added null check for reward logging.

resources/plugin.yml

@@ -1,7 +1,7 @@
 name: MobArena
 author: garbagemule
 main: com.garbagemule.MobArena.MobArena
-version: 0.94.4.61
+version: 0.94.4.62
 softdepend: [Spout,MultiVerse,XcraftGate,Towny,Heroes,MagicSpells,Vault]
 commands:
     ma:

src/com/garbagemule/MobArena/log/YMLSessionBuilder.java

@@ -85,6 +85,8 @@ public class YMLSessionBuilder implements LogSessionBuilder
         Map<String,MutableInt> summed = new HashMap<String,MutableInt>();
         
         for (ItemStack stack : rewards) {
+            if (stack == null) continue;
+            
             String type = (stack.getTypeId() == MobArena.ECONOMY_MONEY_ID ? "money" : stack.getType().toString().toLowerCase());
             if (!summed.containsKey(type)) {
                 summed.put(type, new MutableInt());