rem: if (fd == -1) {
add: if (userPath != NULL) {
context: _user_setcwd(int fd, const char *userPath){	char path[B_PATH_NAME_LENGTH];	PRINT(("user_setcwd: path = %p\n", userPath));	if (fd == -1) {		if (!IS_USER_ADDRESS(userPath)			|| user_strlcpy(path, userPath, B_PATH_NAME_LENGTH) < B_OK)			return B_BAD_ADDRESS;	}	return set_cwd(fd, path, false);}