[PATCH] empty SMS replaced by default message

Hello,
I sent this patch a few days ago, but I've been told that mail with 
patch attached should be prefixed with [PATCH] so I resend it.

The problem is that judging by fields_to_dcs function in sms.c, an empty
message with an activating MWI flag should result in "discard message"
MWI whereas a non-empty message should result in "store message" MWI.

But when the smsbox handle the message sent by sendsms HTTP interface,
it replace the empty text by a default message. This problem is already
highlighted in the comment in the file. Here is the interesting part of
the file.

/*
   * Empty message? Two alternatives have to be handled:
   *  a) it's a HTTP sms-service reply: either ignore it or
   *     substitute the "empty" warning defined
   *  b) it's a sendsms HTTP interface call: leave the message empty
   *     if at least a UDH is given.
   *
   * XXX this still does not cover the case when the sendsms interface is
   * used with *no* text and udh. What should we do then?!
   */
   if (octstr_len(msg->sms.msgdata) == 0 && octstr_len(msg->sms.udhdata)
== 0) {
       if (trans != NULL && urltrans_omit_empty(trans))
           return 0;
       else
           msg->sms.msgdata = octstr_duplicate(reply_emptymessage);
   }

My proposition is to replace the if statement in order to check if the
message is a mt_reply (case a) or not.

Regards,
Colin

diff -ur gateway/gw/smsbox.c gateway-new/gw/smsbox.c
--- gateway/gw/smsbox.c	2006-07-13 10:05:57.000000000 +0200
+++ gateway-new/gw/smsbox.c	2006-07-13 10:20:11.000000000 +0200
@@ -324,12 +324,8 @@
      *  a) it's a HTTP sms-service reply: either ignore it or
      *     substitute the "empty" warning defined
      *  b) it's a sendsms HTTP interface call: leave the message empty
-     *     if at least a UDH is given.
-     *
-     * XXX this still does not cover the case when the sendsms interface is
-     * used with *no* text and udh. What should we do then?!
      */
-    if (octstr_len(msg->sms.msgdata) == 0 && octstr_len(msg->sms.udhdata) == 0) {
+    if (octstr_len(msg->sms.msgdata) == 0 && msg->sms.sms_type == mt_reply) {
         if (trans != NULL && urltrans_omit_empty(trans))
             return 0;
         else