mgcp_rtp_end: Group statistics members into 'stats' sub-struct

Change-Id: I4e0ecdcd9a75fe08abc55b730780c01617f3d4af
diff --git a/src/libosmo-mgcp/mgcp_vty.c b/src/libosmo-mgcp/mgcp_vty.c
index e938391..7fa3949 100644
--- a/src/libosmo-mgcp/mgcp_vty.c
+++ b/src/libosmo-mgcp/mgcp_vty.c
@@ -167,7 +167,7 @@
 		"   Output-Enabled: %d Force-PTIME: %d%s",
 		state->in_stream.err_ts_counter,
 		state->out_stream.err_ts_counter, VTY_NEWLINE,
-		end->dropped_packets, VTY_NEWLINE,
+		end->stats.dropped_packets, VTY_NEWLINE,
 		codec->payload_type, codec->rate, codec->channels, VTY_NEWLINE,
 		codec->frame_duration_num, codec->frame_duration_den,
 		VTY_NEWLINE, end->frames_per_packet, end->packet_duration_ms,