Fixed issue on RenderTexture canvas clear. The clearRect was affected by previous transformations

Author: bitnenfer

src/gameobjects/rendertexture/RenderTextureCanvas.js

@@ -13,7 +13,10 @@ var RenderTextureCanvas = {
 
     clear: function ()
     {
+        this.context.save();
+        this.context.setTransform(1, 0, 0, 1, 0, 0);
         this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
+        this.context.restore();
         return this;
     },