osmux: Avoid processing further frames if conn not found

Other frames can come from known connections, so let's keep processing
each of them.

Change-Id: I09190140ba917dfada4b0952230b68e0f5f6d43d
diff --git a/src/libosmo-mgcp/mgcp_osmux.c b/src/libosmo-mgcp/mgcp_osmux.c
index ca446ff..a2c138d 100644
--- a/src/libosmo-mgcp/mgcp_osmux.c
+++ b/src/libosmo-mgcp/mgcp_osmux.c
@@ -394,7 +394,7 @@
 		/* FIXME: Get rid of CONN_ID_XXX! */
 		conn_bts = mgcp_conn_get_rtp(endp, CONN_ID_BTS);
 		if (!conn_bts)
-			goto out;
+			continue;
 
 		if (!endp) {
 			LOGP(DLMGCP, LOGL_ERROR,
@@ -478,7 +478,7 @@
 		/* FIXME: Get rid of CONN_ID_XXX! */
 		conn_net = mgcp_conn_get_rtp(endp, CONN_ID_NET);
 		if (!conn_net)
-			goto out;
+			continue;
 
 		if (!endp) {
 			LOGP(DLMGCP, LOGL_ERROR,