videomixer: Do not check if caps are empty when they are NULL

In the case the caps are actually NULL, we should just concider it the
same way as empty caps in that case.

diff --git a/gst/videomixer/videomixer2.c b/gst/videomixer/videomixer2.c
index ce3ba0a..c12f036 100644 (file)
--- a/gst/videomixer/videomixer2.c
+++ b/gst/videomixer/videomixer2.c
@@ -312,7 +312,7 @@ gst_videomixer2_update_converters (GstVideoMixer2 * mix)
 
   downstream_caps = gst_pad_get_allowed_caps (mix->srcpad);
 
-  if (gst_caps_is_empty (downstream_caps))
+  if (!downstream_caps || gst_caps_is_empty (downstream_caps))
     return FALSE;
 
   /* first find new preferred format */