2.1.137 - avoid npe on armor iterating

src/main/java/com/gmail/nossr50/skills/axes/Axes.java

@@ -23,10 +23,13 @@ public class Axes {
     public static double skullSplitterModifier = AdvancedConfig.getInstance().getSkullSplitterModifier();
 
     protected static boolean hasArmor(LivingEntity target) {
-        if(target.getEquipment() == null)
+        if(target == null || !target.isValid() || target.getEquipment() == null)
             return false;
 
         for (ItemStack itemStack : target.getEquipment().getArmorContents()) {
+            if(itemStack == null)
+                continue;
+
             if (ItemUtils.isArmor(itemStack)) {
                 return true;
             }

src/main/java/com/gmail/nossr50/util/skills/SmeltingTracker.java

@@ -98,7 +98,6 @@ public class SmeltingTracker {
                 return;
         }
 
-
         changeFurnaceOwnership(furnace, player);
     }
 }