Code cleanup scePsmf

Basically trying to make it consistent aross all functions to use the following format to return invalid psmf player

	PsmfPlayer *psmfplayer = getPsmfPlayer(psmfPlayer);
	if (!psmfplayer) {
		ERROR_LOG(ME, "xxxxxxx(%08x, %08x): invalid psmf player", psmfPlayer);
		return ERROR_PSMF_NOT_FOUND;
	}