libwine: Allow to specify a non-existing directory as WINEPREFIX.

libs/wine/config.c

@@ -209,10 +209,8 @@ static void init_paths(void)
             fatal_error( "invalid directory %s in WINEPREFIX: not an absolute path\n", prefix );
         if (stat( config_dir, &st ) == -1)
         {
-            if (errno != ENOENT)
-                fatal_perror( "cannot open %s as specified in WINEPREFIX", config_dir );
-            fatal_error( "the '%s' directory specified in WINEPREFIX doesn't exist.\n"
-                         "You may want to create it by running 'wineprefixcreate'.\n", config_dir );
+            if (errno == ENOENT) return;  /* will be created later on */
+            fatal_perror( "cannot open %s as specified in WINEPREFIX", config_dir );
         }
     }
     else