sip_find_white_space
if (sip_find_white_space(hdr)) {
extern int sip_find_white_space(_sip_header_t *);
if (sip_find_white_space(sip_header)) {
if (sip_find_white_space(sip_header) != 0) {
if (sip_find_white_space(sip_header) == 0) {
if (sip_find_white_space(sip_header)) {