libwine: Avoid a compiler warning on Solaris.
diff --git a/libs/wine/config.c b/libs/wine/config.c
index b721108..07ff07f 100644
--- a/libs/wine/config.c
+++ b/libs/wine/config.c
@@ -190,7 +190,7 @@
     }
     if (!user)
     {
-        sprintf( uid_str, "%u", getuid() );
+        sprintf( uid_str, "%lu", (unsigned long)getuid() );
         user = uid_str;
     }
 #else  /* HAVE_GETPWUID */