Attempt to fix compile error with msvc

lib/nghttp2_hd.c

@@ -1329,11 +1329,10 @@ nghttp2_hd_nv nghttp2_hd_table_get(nghttp2_hd_context *context, size_t idx) {
     return hd_ringbuf_get(&context->hd_table, idx - NGHTTP2_STATIC_TABLE_LENGTH)
         ->nv;
   } else {
-    nghttp2_hd_static_entry *ent;
-
-    ent = &static_table[idx];
-    return (nghttp2_hd_nv){&ent->name, &ent->value, ent->token,
+    nghttp2_hd_static_entry *ent = &static_table[idx];
+    nghttp2_hd_nv nv = {&ent->name, &ent->value, ent->token,
                         NGHTTP2_NV_FLAG_NONE};
+    return nv;
   }
 }
 

lib/nghttp2_rcbuf.c

@@ -94,5 +94,6 @@ void nghttp2_rcbuf_decref(nghttp2_rcbuf *rcbuf) {
 }
 
 nghttp2_vec nghttp2_rcbuf_get_buf(nghttp2_rcbuf *rcbuf) {
-  return (nghttp2_vec){rcbuf->base, rcbuf->len};
+  nghttp2_vec res = {rcbuf->base, rcbuf->len};
+  return res;
 }