- compile with -Ofast
- use restricted pointers for vc_copyline functions
- use a vectorizable for-loop
- small fixes - in vc_copylineR12LtoRGB was not decoded last few pixels
and in copylineYUVtoRGB was out-of-bound access (not likely, only if
output dst_len was not divisible by 6)
Note: C99 restrict cannot be used because restrict is not a keyword in
C++. __restrict__ or __restrict can be used (the later is supported also
by MSVC).
+ rename min/max macro
