winmm: Avoid casting return value of Heap(Re)Alloc calls.

[Frédéric Delanoy]

2011/10/22 Dan Kegel <dank at kegel.com>:
> Doesn't build here:
>
> ccache gcc -c -I. -I. -I../../include -I../../include  -D__WINESRC__
> -D_WINMM_ -D_REENTRANT -fPIC -Wall -pipe -fno-strict-aliasing
> -Wdeclaration-after-statement -Wempty-body -Wstrict-prototypes
> -Wtype-limits -Wunused-but-set-parameter -Wwrite-strings
> -fno-omit-frame-pointer -Wpointer-arith -Wlogical-op
> -I/usr/include/freetype2  -g -O0 -Werror -Wno-unused-but-set-variable
> -Wno-unused-but-set-parameter  -o lolvldrv.o lolvldrv.c
> lolvldrv.c: In function 'MMDRV_InitPerType':
> lolvldrv.c:406:13: error: pointer of type 'void *' used in arithmetic
> [-Werror=pointer-arith]
> lolvldrv.c:411:13: error: pointer of type 'void *' used in arithmetic
> [-Werror=pointer-arith]
> cc1: all warnings being treated as errors
> make[1]: Leaving directory
> `/home/bob/wineslave.dir/sandbox/slave/runtests-default/build/dlls/winmm'
> make[1]: *** [lolvldrv.o] Error 1
> make: *** [dlls/winmm] Error 2

Right.
OK thx. Should probably restructure that section as well (and add
-Werror to my CFLAGS)