am 3621c056: am bcc8e581: am bb99a362: am 8d60fc3e: am 338bbf53: am fd334e34: am 03d539a7: am a5b9055d: am f1ce97dd: Fix integer overflow when handling MPEG4 tx3g atom

* commit '3621c05605c5a3f2c452668beacb71a08dc2d7c8':
  Fix integer overflow when handling MPEG4 tx3g atom