user32: Don't rely on the cached position for windows that have a mirrored parent.
[wine] / dlls / userenv /
drwxr-xr-x   ..
-rw-r--r-- 111 Makefile.in
drwxr-xr-x - tests
-rw-r--r-- 890 userenv.spec
-rw-r--r-- 10517 userenv_main.c