Update to sparsetype parsing

src/engine/objects/ItemTemplate.java

@@ -547,7 +547,7 @@ public class ItemTemplate {
 
                 for (Object key : rune_sparse_json.keySet()) {
                     String sparseType = key.toString();
-                    String sparseValue = (String) rune_sparse_json.get(sparseType);
+                    String sparseValue = rune_sparse_json.getString(sparseType);
                     rune_sparse_data.put(sparseType, sparseValue);
                 }