rem: int len;  len = XML_VERSION_L + CRLF_L + DOCTYPE_L + CRLF_L + PRESENCE_STAG_L + CRLF_L;  if (len > *_l) {
add: if ((XML_VERSION_L + CRLF_L + DOCTYPE_L + CRLF_L + PRESENCE_STAG_L + CRLF_L ) > _l) {
context: int start_xpidf_doc(str* _b, int* _l){	int len;	len = XML_VERSION_L + CRLF_L + DOCTYPE_L +		CRLF_L + PRESENCE_STAG_L + CRLF_L;			if (len > *_l) {		paerrno = PA_SMALL_BUFFER;		LOG(L_ERR, "start_xpidf_doc(): Buffer too small\n");		*_l = len - *_l;		return -1;	}	str_append(_b, XML_VERSION CRLF DOCTYPE CRLF PRESENCE_STAG CRLF, len);	return 0;}