hush cranky compiles due to no format string

src/switch_core.c

@@ -82,7 +82,7 @@ static void send_heartbeat(void)
 								duration.sec, duration.sec == 1 ? "" : "s",
 								duration.ms, duration.ms == 1 ? "" : "s", duration.mms, duration.mms == 1 ? "" : "s");
 
-		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "FreeSWITCH-Version", switch_version_full());
+		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "FreeSWITCH-Version", "%s", switch_version_full());
 		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Uptime-msec", "%"SWITCH_TIME_T_FMT, switch_core_uptime() / 1000);
 		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Session-Count", "%u", switch_core_session_count());
 		switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Max-Sessions", "%u", switch_core_session_limit(0));