af_volume: add NEON optimization for common float case.

gcc is too stupid to use vmin/vmax, which leads to float
code interleaved with status register reads, which has simply
horrible performance.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36499 b3059339-0415-0410-9bf9-f77b7e298cf2
vo_corevideo: Add include to fix compilation on OSX 10.9

Patch by Johan Andersson [j i19 se]

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36500 b3059339-0415-0410-9bf9-f77b7e298cf2