Don't steal a ref to event in gst.BaseTransform.do_src_event.
Don't steal a ref to event in gst.BaseTransform.do_src_event.

GStreamer/gst-python,pexip/gst-python,alessandrod/gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,alessandrod/gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,lubosz/gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,pexip/gst-python,lubosz/gst-python,alessandrod/gst-python,GStreamer/gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,pexip/gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,freedesktop-unofficial-mirror/gstreamer-sdk__gst-python,lubosz/gst-python,GStreamer/gst-python