osmux: Avoid filling in seqnum holes upon rx of RTP pkt with M bit set

Change-Id: I561fb836989d31f43a15b193ed9bec4103ea0f2b
---
M src/osmux_input.c
1 file changed, 4 insertions(+), 0 deletions(-)

diff --git a/src/osmux_input.c b/src/osmux_input.c
index 6e6b00d..3e6f4b7 100644
--- a/src/osmux_input.c
+++ b/src/osmux_input.c
@@ -435,6 +435,10 @@
 	int i, rc;
 	struct osmux_in_req clone_req;
 
+	/* If M bit is set, this is a sync point, so any sort of seq jump is expected and has no real meaning. */
+	if (req->rtph->marker)
+		return 0;
+
 	/* Have we seen any RTP packet in this batch before? */
 	if (llist_empty(&req->circuit->msg_list))
 		return 0;

