am: 13c6b61616
* commit '13c6b61616d43912996be3302ab2d02ca2b51a99':
MediaPlayer: use local variable to check member is null.
am: 13c6b61616
* commit '13c6b61616d43912996be3302ab2d02ca2b51a99':
MediaPlayer: use local variable to check member is null.