session: avoid dgram dequeues with no transport

Type: fix

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I1a3393b579caeb5dc25b60bc1b4a71706fb07051

src/vnet/session/session_node.c

@@ -1163,6 +1163,11 @@ session_tx_not_ready (session_t * s, u8 peek_data)
 	  return 2;
 	}
     }
+  else
+    {
+      if (s->session_state == SESSION_STATE_TRANSPORT_DELETED)
+	return 2;
+    }
   return 0;
 }