Protect RTCP packet lost calculation against incorrect packet expectations

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@389 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip-apps/src/samples/siprtp.c b/pjsip-apps/src/samples/siprtp.c
index 03fb279..d8d18f1 100644
--- a/pjsip-apps/src/samples/siprtp.c
+++ b/pjsip-apps/src/samples/siprtp.c
@@ -1416,7 +1416,7 @@
 
 
     /* Print duration */
-    if (inv->state == PJSIP_INV_STATE_CONFIRMED) {
+    if (inv->state >= PJSIP_INV_STATE_CONFIRMED) {
 	pj_time_val now;
 
 	pj_gettimeofday(&now);