msi: Don't fail if the directory already exists in MsiCreateAndVerifyInstallerDirectory.
[wine] / dlls / mswsock /
drwxr-xr-x   ..
-rw-r--r-- 126 Makefile.in
-rw-r--r-- 5936 mswsock.c
-rw-r--r-- 888 mswsock.spec
-rw-r--r-- 1104 version.rc