util: set uid/gid of created directory even when zero

Call chown() in create_dir() even when the specified uid/gid is zero.
This is needed on BSD systems, where directories are created with gid
of the parent directory.

util.c

@@ -945,8 +945,8 @@ create_dir(char *p, mode_t mode, uid_t uid, gid_t gid)
     return 0;
   }
 
-  /* Change its ownership if requested */
-  if ((uid || gid) && chown(p, uid, gid) < 0) {
+  /* Set its owner */
+  if (chown(p, uid, gid) < 0) {
     LOG(LOGS_ERR, LOGF_Util, "Could not change ownership of %s : %s", p, strerror(errno));
     /* Don't leave it there with incorrect ownership */
     rmdir(p);