Cleanup previous commit

lib/nghttp2_session.c

@@ -2997,13 +2997,16 @@ int nghttp2_session_on_request_headers_received(nghttp2_session *session,
   /* If client recieves idle stream from server, it is invalid
      regardless stream ID is even or odd.  This is because client is
      not expected to receive request from server. */
-  if (!session->server &&
-      session_detect_idle_stream(session, frame->hd.stream_id)) {
+  if (!session->server) {
+    if (session_detect_idle_stream(session, frame->hd.stream_id)) {
       return session_inflate_handle_invalid_connection(
           session, frame, NGHTTP2_PROTOCOL_ERROR,
           "request HEADERS: client received request");
     }
 
+    return NGHTTP2_ERR_IGN_HEADER_BLOCK;
+  }
+
   if (!session_is_new_peer_stream_id(session, frame->hd.stream_id)) {
     /* The spec says if an endpoint receives a HEADERS with invalid
        stream ID, it MUST issue connection error with error code