Fix for memory leak of the GB2Collision
Revert "Fix for memory leak of the GB2Collision"

This reverts commit fc6fe4fa2b49d7aefcef585669df5a63ac8b1ec2.
Fix for memory leak of the GB2Collision
Merge pull request #2 from nikitoz/channon_gles20

GB2WorldContactListener::notifyObjects leaks