mingw crossbuild broke

[Kevin Koltzau]

the mingw crossbuild broke last night with

mmap.c: In function `wine_mmap_add_reserved_area':
mmap.c:291: error: `PROT_NONE' undeclared (first use in this function)
mmap.c:291: error: (Each undeclared identifier is reported only once
mmap.c:291: error: for each function it appears in.)
mmap.c:291: error: `MAP_FIXED' undeclared (first use in this function)

should those defines be included in one of our headers?