Make result type of hd_inflate_commit_indexed void

lib/nghttp2_hd.c

@@ -1677,16 +1677,14 @@ static ssize_t hd_inflate_read(nghttp2_hd_inflater *inflater, nghttp2_buf *buf,
 }
 
 /*
- * Finalize indexed header representation reception. header is always
- * emitted, |*nv_out| is filled with that value and 0 is returned.
+ * Finalize indexed header representation reception.  The referenced
+ * header is always emitted, and |*nv_out| is filled with that value.
  */
-static int hd_inflate_commit_indexed(nghttp2_hd_inflater *inflater,
-                                     nghttp2_hd_nv *nv_out) {
+static void hd_inflate_commit_indexed(nghttp2_hd_inflater *inflater,
+                                      nghttp2_hd_nv *nv_out) {
   nghttp2_hd_nv nv = nghttp2_hd_table_get(&inflater->ctx, inflater->index);
 
   emit_header(nv_out, &nv);
-
-  return 0;
 }
 
 /*