mpeg4video_parser: K&R formatting cosmetics

Signed-off-by: Diego Biurrun <diego@biurrun.de>
os_support: Add #endif comments for better readability
Merge commit 'c68d4c230ad8ca85af3999a6af8e582c43620d58'

* commit 'c68d4c230ad8ca85af3999a6af8e582c43620d58':
  mpeg4video_parser: K&R formatting cosmetics

Conflicts:
	libavcodec/mpeg4video_parser.c

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

* qatar/master:
  os_support: Add #endif comments for better readability

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/libmp3lame: add ABR support

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>