Merge pull request phaserjs#2939 from nervestaple/patch-1

undefined-checking skipframes

Author: photonstorm

v2-community/src/animation/AnimationParser.js

@@ -31,6 +31,7 @@ Phaser.AnimationParser = {
         if (frameMax === undefined) { frameMax = -1; }
         if (margin === undefined) { margin = 0; }
         if (spacing === undefined) { spacing = 0; }
+        if (skipFrames === undefined) { skipFrames = 0; }
 
         var img = key;