AudioSource: initialize variables am: a2f5b80 am: 67e0eb7 am: 9c67287 am: 211ec4d am: 1bc35dd
am: 8cb55c6

* commit '8cb55c68dcecb3f417eb47490cff2d447e787f2b':
  AudioSource: initialize variables

Change-Id: I40aca09c325bbeb0c0c6bd4e76ba1912db3c29ab