--- a/session.c	Sat Apr 19 19:10:41 2014 +0500
+++ b/session.c	Sat Apr 19 19:27:26 2014 +0500
@@ -675,7 +675,7 @@
 	CASE(TRANSACTION);
 	CASE(UPDATE);
 	default:
-		snprintf(buf, sizeof(buf), "%d ???", state);
+		(void)snprintf(buf, sizeof(buf), "%d ???", state);
 		return (buf);
 	}
 }