Guillaume Desmottes 4cb935bcea basetransform: fix critical if transform_caps() returned NULL
klass->transform_caps() may return NULL, which was raising this
critical:

  GStreamer-CRITICAL **: 12:23:56.243: gst_caps_is_subset: assertion 'subset != NULL' failed

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2528>
2022-05-31 14:27:51 +02:00
..