acls: sync type for orig_umask

When sizeof(mode_t) != sizeof(int) it will result in unintentional
reads of global memory.

While at it, silence again a warning that is being triggered by
Apple's clang 15.

acls.c

@@ -28,7 +28,7 @@ extern int dry_run;
 extern int am_root;
 extern int read_only;
 extern int list_only;
-extern int orig_umask;
+extern mode_t orig_umask;
 extern int numeric_ids;
 extern int inc_recurse;
 extern int preserve_devices;
@@ -982,7 +982,7 @@ static int set_rsync_acl(const char *fname, acl_duo *duo_item,
 		 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
 			return -1;
 #ifdef HAVE_OSX_ACLS
-		mode = 0; /* eliminate compiler warning */
+		(void)mode; /* eliminate compiler warning */
 #else
 		if (type == SMB_ACL_TYPE_ACCESS) {
 			cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl, cur_mode, mode);