while (*to && *to=='\t') to++;
if ( to-from != 1 ) {
debug("[sam_header_line_parse] multiple tabs on line [%s] (%d)\n", headerLine,(int)(to-from));
while (*to && *to=='\t') to++;
if ( to-from != 1 ) {
debug("[sam_header_line_parse] multiple tabs on line [%s] (%d)\n", headerLine,(int)(to-from));