EngMaskBitBlt() ASSERT instead of if(), this function should trust it's callers
drwxr-xr-x - freeldr
drwxr-xr-x - msvc6
drwxr-xr-x - os2
drwxr-xr-x - posix
drwxr-xr-x - reactos
drwxr-xr-x - rosapps