Original commit message from CVS:
Reviewed by: Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/snapshot/gstsnapshot.c: (gst_snapshot_class_init),
(snapshot_handler), (gst_snapshot_sinkconnect),
(gst_snapshot_chain):
Allocate resources when required, fix recursive signal emission
and fix caps. Fixes#161667.