Parsing cleanup

src/engine/objects/ItemTemplate.java

@@ -130,7 +130,10 @@ public class ItemTemplate {
         }
 
         item_parry_anim_id = ((Long) jsonObject.get("item_parry_anim_id")).intValue();
-        item_bulk_factor = ((Double) jsonObject.get("item_bulk_factor")).floatValue();
+
+        if (jsonObject.containsValue("item_bulk_factor"))
+            item_bulk_factor = ((Double) jsonObject.get("item_bulk_factor")).floatValue();
+
         item_defense_rating = ((Double) jsonObject.get("item_defense_rating")).floatValue();
 
         JSONArray itemflags = (JSONArray) jsonObject.get("item_flags");