quartz: Check allocation failure and clearmemoryinDSound Renderer

[Dmitry Timoshkov]

"Alexandre Julliard" <julliard at winehq.org> wrote:

> The point is that (void*)0 isn't guaranteed to be represented by an
> all-zero bit pattern; but that's the case on any platform worth
> worrying about.

If (void*)0 doesn't guarantee to actually set all bits to 0, then
HEAP_ZERO_MEMORY doesn't guarantee it either.

-- 
Dmitry.