lib-storage: fs_list_get_mailbox_flags() - Don't assume directories a…

…lways have children.

This makes the directory handling code equivalent for type==UNKNOWN and
type==DIR.

src/lib-storage/list/mailbox-list-fs-flags.c

@@ -210,7 +210,7 @@ int fs_list_get_mailbox_flags(struct mailbox_list *list,
 		   MAILBOX_LIST_FILE_TYPE_UNKNOWN because the filesystem didn't
 		   return the type. Normally this should have already been
 		   handled by the MAILBOX_LIST_FILE_TYPE_DIR check above. */
-		*flags_r |= MAILBOX_NOSELECT | MAILBOX_CHILDREN;
+		*flags_r |= MAILBOX_NOSELECT;
 		return 1;
 	}