[vala/staging: 3/3] gstreamer: Update from 1.17.0+ git master

[Rico Tzschichholz <ricotz src gnome org>]

commit 82aafab3cc46145c1593fae10898d5ab8994a6b4
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Sep 1 15:55:35 2019 +0200

    gstreamer: Update from 1.17.0+ git master

 vapi/gstreamer-rtsp-server-1.0.vapi | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/vapi/gstreamer-rtsp-server-1.0.vapi b/vapi/gstreamer-rtsp-server-1.0.vapi
index c09136e24..e38d5992b 100644
--- a/vapi/gstreamer-rtsp-server-1.0.vapi
+++ b/vapi/gstreamer-rtsp-server-1.0.vapi
@@ -221,6 +221,8 @@ namespace Gst {
                        [NoWrapper]
                        public virtual bool handle_message (Gst.Message message);
                        public virtual bool handle_sdp (Gst.SDP.Message sdp);
+                       [Version (since = "1.18")]
+                       public bool has_completed_sender ();
                        [Version (since = "1.16")]
                        public bool is_bind_mcast_address ();
                        public bool is_eos_shutdown ();