Update to sparsetype parsing

src/engine/objects/ItemTemplate.java

@@ -545,9 +545,10 @@ public class ItemTemplate {
 
                 JSONObject rune_sparse_json = jsonObject.getJSONObject("rune_sparse_data");
 
-                for (String sparseType : rune_sparse_json.keySet()) {
-                    Object sparseValue = rune_sparse_json.getString(sparseType);
-                    rune_sparse_data.put(sparseType, sparseValue.toString());
+                for (Object key : rune_sparse_json.keySet()) {
+                    String sparseType = key.toString();
+                    String sparseValue = (String) rune_sparse_json.get(sparseType);
+                    rune_sparse_data.put(sparseType, sparseValue);
                 }
 
                 JSONArray skill_adj_json = (JSONArray) jsonObject.get("rune_skill_adj");