add cleanupdef method to fix mask looping
add cleanupdef method to fix mask looping

cjgammon/SnapSVG-Animator,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/SnapSVG-Animator,cjgammon/SnapSVG-Animator,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/SnapSVG-Animator,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/SnapSVG-Animator,cjgammon/SnapSVG-Animator,cjgammon/SnapSVG-Animator,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/SnapSVG-Animator,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/Flash-Plugin-SnapPlatform,cjgammon/SnapSVG-Animator,cjgammon/SnapSVG-Animator