mod_sms: fix "format literal and no arguments" warning

mod_sms.c: In function ‘reply_function’:
mod_sms.c:450: error: format not a string literal and no format arguments

Reported-by: Gill #freeswitch @ irc.freenode.net
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

src/mod/applications/mod_sms/mod_sms.c

@@ -445,9 +445,9 @@ SWITCH_STANDARD_CHAT_APP(reply_function)
 
 	if (proto) {
 		switch_ivr_create_message_reply(&reply, message, SMS_CHAT_PROTO);
-		
+
 		if (!zstr(data)) {
-			switch_event_add_body(reply, data);
+			switch_event_add_body(reply, "%s", data);
 		}
 
 		switch_core_chat_deliver(proto, &reply);