Fix memory leak getting new sample in callbacks
Fix memory leak getting new sample in callbacks

Change-Id: I5f45f55e4ef0ede0d34e837d5afec8b637ac22c2

TribeMedia/kms-elements,TribeMedia/kms-elements,shelsonjava/kms-elements,shelsonjava/kms-elements,Kurento/kms-elements,shelsonjava/kms-elements,TribeMedia/kms-elements,Kurento/kms-elements,Kurento/kms-elements