webrtc: fix returning code 404 when a stream does not exist (#3369)

internal/servers/webrtc/server_test.go

@@ -90,7 +90,7 @@ func (pm *dummyPathManager) AddPublisher(_ defs.PathAddPublisherReq) (defs.Path,
 
 func (pm *dummyPathManager) AddReader(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
 	if req.AccessRequest.Name == "nonexisting" {
-		return nil, nil, &defs.PathNoOnePublishingError{}
+		return nil, nil, defs.PathNoOnePublishingError{}
 	}
 	return pm.path, pm.path.stream, nil
 }

internal/servers/webrtc/session.go

@@ -518,7 +518,7 @@ func (s *session) runRead() (int, error) {
 			return http.StatusUnauthorized, err
 		}
 
-		var terr2 *defs.PathNoOnePublishingError
+		var terr2 defs.PathNoOnePublishingError
 		if errors.As(err, &terr2) {
 			return http.StatusNotFound, err
 		}