Parse offering info.

src/engine/objects/ItemTemplate.java

@@ -182,7 +182,7 @@ public class ItemTemplate {
             for (Object entry : offering_data) {
                 JSONObject offering_entry = (JSONObject) entry;
                 String offering_type = ((String) offering_entry.get("offering_type")).replaceAll("-", "");
-                int offering_value = ((Double) offering_entry.get("offering_value")).intValue();
+                int offering_value = ((Long) offering_entry.get("offering_value")).intValue();
                 item_offering_info.put(offering_type, offering_value);
             }