This fixes a regression from my previous patch in commit
55ba3648, which was
checking for mmap() returning NULL instead of MAP_FAILED.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49225Signed-off-by: Damjan Jovanovic <damjan.jov@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>