[PATCH spice-gtk 2/2] gstreamer: Avoid dangling pointers in free_pipeline

[Frediano Ziglio <freddy77@xxxxxxxxx>]

Although currently after free_pipeline we free the entire structure
the name and the function suggests that we only free the pipeline.
Also this is fixing a future possible problem with the series
from Vivek Kasireddy reusing the SpiceGstDecoder for another
pipeline if H/W encoder pipeline creation fails.

Signed-off-by: Frediano Ziglio <freddy77@xxxxxxxxx>
---
 src/channel-display-gst.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/channel-display-gst.c b/src/channel-display-gst.c
index 3bd948d2..ffc2edbf 100644
--- a/src/channel-display-gst.c
+++ b/src/channel-display-gst.c
@@ -361,11 +361,14 @@ static void free_pipeline(SpiceGstDecoder *decoder)
 
     gst_element_set_state(decoder->pipeline, GST_STATE_NULL);
     gst_object_unref(decoder->appsrc);
+    decoder->appsrc = NULL;
     if (decoder->appsink) {
         gst_object_unref(decoder->appsink);
+        decoder->appsink = NULL;
     }
-    gst_object_unref(decoder->pipeline);
     gst_object_unref(decoder->clock);
+    decoder->clock = NULL;
+    gst_object_unref(decoder->pipeline);
     decoder->pipeline = NULL;
 }
 
-- 
2.41.0