Fix loading remote image without extension issue

Author: pandamicro

Diff for: cocos2d/core/textures/CCTextureCache.js

@@ -358,10 +358,13 @@ cc.game.addEventListener(cc.game.EVENT_RENDERER_INITED, function () {
 
             tex = locTexs[url] = new cc.Texture2D();
             tex.url = url;
-            var loadFunc = cc.loader._checkIsImageURL(url) ? cc.loader.load : cc.loader.loadImg;
-            loadFunc.call(cc.loader, url, function (err, img) {
+            cc.loader.loadImg(url, function (err, img) {
                 if (err)
                     return cb && cb.call(target, err);
+
+                if (!cc.loader.cache[url]) {
+                    cc.loader.cache[url] = img;
+                }
                 cc.textureCache.handleLoadedTexture(url);
 
                 var texResult = locTexs[url];

Diff for: cocos2d/core/textures/TexturesWebGL.js

@@ -914,10 +914,13 @@ cc._tmp.WebGLTextureCache = function () {
 
         tex = locTexs[url] = new cc.Texture2D();
         tex.url = url;
-        var loadFunc = cc.loader._checkIsImageURL(url) ? cc.loader.load : cc.loader.loadImg;
-        loadFunc.call(cc.loader, url, function (err, img) {
+        cc.loader.loadImg(url, function (err, img) {
             if (err)
                 return cb && cb.call(target, err);
+
+            if (!cc.loader.cache[url]) {
+                cc.loader.cache[url] = img;
+            }
             cc.textureCache.handleLoadedTexture(url);
 
             var texResult = locTexs[url];