Merge pull request phaserjs#3937 from goldfire/goldfire-patch-1

Use correct frame name in pixel perfect hit test

Author: photonstorm

src/input/CreatePixelPerfectHandler.js

@@ -21,7 +21,7 @@ var CreatePixelPerfectHandler = function (textureManager, alphaTolerance)
 {
     return function (hitArea, x, y, gameObject)
     {
-        var alpha = textureManager.getPixelAlpha(x, y, gameObject.texture.key, gameObject.frame.key);
+        var alpha = textureManager.getPixelAlpha(x, y, gameObject.texture.key, gameObject.frame.name);
 
         return (alpha && alpha >= alphaTolerance);
     };