msiexec: Ignore failure to create the service if it already exists.
[wine] / programs / msiexec /
drwxr-xr-x   ..
-rw-r--r-- 315 Makefile.in
-rw-r--r-- 21417 msiexec.c
-rw-r--r-- 3377 rsrc.rc
-rw-r--r-- 1160 version.rc