/* Look up a header name (assume lower-case header_name).  */
static gint* get_hf_for_header(char *header_name)
/* Look up a header name (assume lower-case header_name).  */
static gint* get_hf_for_header(char *header_name)
{
	gint* hf_id = NULL;
	if (header_fields_hash) {
		hf_id = (gint*) g_hash_table_lookup(header_fields_hash, header_name);
	} else {
		hf_id = NULL;
	}
	return hf_id;
}