Both sparse fields parsed

src/engine/objects/ItemTemplate.java

@@ -495,7 +495,7 @@ public class ItemTemplate {
                 rune_renderable = ((Boolean) jsonObject.get("rune_renderable"));
                 rune_natural_power_attack = ((Long) jsonObject.get("rune_natural_power_attack")).intValue();
 
-                JSONObject rune_sparse_json = (JSONObject) jsonObject.get("rune_speed");
+                JSONObject rune_sparse_json = (JSONObject) jsonObject.get("rune_sparse_data");
 
                 for (Object key : rune_sparse_json.keySet()) {
                     String sparseType = (String) key;