Fix issue unrefering null caps. Better solution than ``` if (src->caps) gst_caps_unref (src->caps); ``` Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6432>
Fix issue unrefering null caps. Better solution than ``` if (src->caps) gst_caps_unref (src->caps); ``` Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6432>