aac: K&R formatting cosmetics
aac: return meaningful errors
Fix muxing QDM2 mono into caf.
Set block_align when reading QDM2 in mov.

Fixes ticket #2718.
Avoid a null pointer dereference in avcodec_decode_video2().

This could happen if oom occured while probing a file.
Reported in ticket #1900.
Merge commit '6d8629aac13692447b54eac795bf74007ebf8987'

* commit '6d8629aac13692447b54eac795bf74007ebf8987':
  aac: K&R formatting cosmetics

Conflicts:
	libavcodec/aacdec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  aac: return meaningful errors

Conflicts:
	libavcodec/aacdec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  Avoid a null pointer dereference in avcodec_decode_video2().
  Set block_align when reading QDM2 in mov.
  Fix muxing QDM2 mono into caf.

Merged-by: Michael Niedermayer <michaelni@gmx.at>