[rhythmbox] xfade: report position for playing but unlinked streams correctly

[Jonathan Matthew <jmatthew src gnome org>]

commit f8a41308ededda16f3aee65794f78ce51e29e6c3
Author: Jonathan Matthew <jonathan d14n org>
Date:   Sat Dec 5 20:59:19 2020 +1000

    xfade: report position for playing but unlinked streams correctly
    
    If the stream isn't currently linked, we won't get anything useful
    by querying the pipeline position, instead query the stream.

 backends/gstreamer/rb-player-gst-xfade.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/backends/gstreamer/rb-player-gst-xfade.c b/backends/gstreamer/rb-player-gst-xfade.c
index ebc270960..3c058b278 100644
--- a/backends/gstreamer/rb-player-gst-xfade.c
+++ b/backends/gstreamer/rb-player-gst-xfade.c
@@ -2735,7 +2735,7 @@ get_times_and_stream (RBPlayerGstXFade *player, RBXFadeStream **pstream, gint64
                if (pos != NULL) {
                        if (buffering) {
                                *pos = 0;
-                       } else if (stream->state == PAUSED) {
+                       } else if (stream->state == PAUSED || stream->adder_pad == NULL) {
                                *pos = -1;
 
                                gst_element_query_position (stream->volume, GST_FORMAT_TIME, pos);