[x265] [PATCH] asm: prevent assembly use in 32bit HBD builds

[Steve Borho]

On 03/06, Mario *LigH* Rohkr??mer wrote:
> This patch as such may be incomplete, because make still tries to
> compile the assembler code and fails due to 64-bit mode registers,
> so the whole build appears to fail:

Hmm, yeah. I forgot that with the cmake cache one could configure the
build for 16bpp with an x86 target without having to edit the
CMakeLists.txt file and the seeing the large warning there and the hint
to disable assembly.

At the least, asm-primitives.cpp could issue a more descriptive compile
error before the link errors are evident.

-- 
Steve Borho