int 
MyLib::strToInt(...)
PREINIT:
	SV* passfailSV;
	bool passfail;
CODE:
	if(items == 2) {
		SV* passfailSV = ST(1);
		RETVAL = THIS->strToInt(&passfail);
		SvSetMagicSV(passfailSV, passfail ? &PL_sv_yes : &PL_sv_no);
	} else if(items == 1) {
		RETVAL = THIS->strToInt();
	} else
		croak("Usage: MyLib->strToInt(...)");
OUTPUT:
	RETVAL