unify mouse and touch

Author: krmbn0576

js/rpg_core/Graphics.js

@@ -287,8 +287,7 @@ Graphics.printLoadingError = function(url) {
         button.style.fontSize = '24px';
         button.style.color = '#ffffff';
         button.style.backgroundColor = '#000000';
-        button.onclick = ResourceHandler.retry.bind(ResourceHandler);
-        button.ontouchstart = function(event) {
+        button.onmousedown = button.ontouchstart = function(event) {
             ResourceHandler.retry();
             event.stopPropagation();
         };