vcf: Expose bcf_hdr_sync() and hrec_add_idx()

htslib/vcf.h

@@ -410,6 +410,7 @@ extern "C" {
 
     /** The following functions are for internal use and should rarely be called directly */
     int bcf_hdr_parse(bcf_hdr_t *hdr, char *htxt);
+    int bcf_hdr_sync(bcf_hdr_t *h);
     bcf_hrec_t *bcf_hdr_parse_line(const bcf_hdr_t *h, const char *line, int *len);
     void bcf_hrec_format(const bcf_hrec_t *hrec, kstring_t *str);
     int bcf_hdr_add_hrec(bcf_hdr_t *hdr, bcf_hrec_t *hrec);
@@ -418,6 +419,7 @@ extern "C" {
     void bcf_hrec_add_key(bcf_hrec_t *hrec, const char *str, int len);
     void bcf_hrec_set_val(bcf_hrec_t *hrec, int i, const char *str, int len, int is_quoted);
     int bcf_hrec_find_key(bcf_hrec_t *hrec, const char *key);
+    void hrec_add_idx(bcf_hrec_t *hrec, int idx);
     void bcf_hrec_destroy(bcf_hrec_t *hrec);