 duplicated "struct tomoyo_path_number_acl" entry.  *  * @a:         Pointer to "struct tomoyo_acl_info".  * @b:         Pointer to "struct tomoyo_acl_info".  * @is_delete: True for @a &= ~@b, false for @a |= @b.  *  * Returns true if @a is empty, false otherwise.  */ static bool tomoyo_merge_path_