fix segfault

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@2296 d0543943-73ff-0310-b7d9-9358b9ac24b2

diff --git a/src/switch_event.c b/src/switch_event.c
index 01ad05c6814258092f434cf8d55ebcfc269730b9..a8e97ca636db61efc25d4c3dd67a103ac3a3ed6b 100644 (file)
--- a/src/switch_event.c
+++ b/src/switch_event.c
@@ -441,9 +441,11 @@ SWITCH_DECLARE(switch_status_t) switch_event_add_body(switch_event_t *event, cha
        char data[2048];
 
        va_list ap;
-       va_start(ap, fmt);
-       vsnprintf(data, sizeof(data), fmt, ap);
-       va_end(ap);
+       if (fmt) {
+               va_start(ap, fmt);
+               vsnprintf(data, sizeof(data), fmt, ap);
+               va_end(ap);
+       }
 
        if (ret == -1) {
                return SWITCH_STATUS_MEMERR;