am c7a58efa: am def6aff8: am 1c4549c3: am 84a131f2: am 39ab7cea: am 88aa97ea: am 3ce29384: libstagefright: fix possible overflow in amrwbenc.

* commit 'c7a58efaa8276036ae307a16bc9ee2411926ff9e':
  libstagefright: fix possible overflow in amrwbenc.