do destructive session destroy in debug mode.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4922 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_core_session.c

@@ -671,6 +671,9 @@ SWITCH_DECLARE(void) switch_core_session_destroy(switch_core_session_t **session
 	switch_channel_uninit((*session)->channel);
 
 	pool = (*session)->pool;
+#ifndef NDEBUG
+	memset(*session, 0, sizeof(switch_core_session_t));
+#endif
 	*session = NULL;
 	apr_pool_destroy(pool);
 	pool = NULL;