- Don't print error to the log when trying to delete non-existing draft message

program/steps/mail/sendmail.inc

@@ -640,8 +640,7 @@ if ($savedraft)
 else
   $store_target = isset($_POST['_store_target']) ? get_input_value('_store_target', RCUBE_INPUT_POST) : $CONFIG['sent_mbox'];
 
-if ($store_target)
-  {
+if ($store_target) {
   // check if folder is subscribed
   if ($IMAP->mailbox_exists($store_target, true))
     $store_folder = true;
@@ -653,7 +652,6 @@ if ($store_target)
 
   // append message to sent box
   if ($store_folder) {
-
     // message body in file
     if ($mailbody_file || $MAIL_MIME->getParam('delay_file_io')) {
       $headers = $MAIL_MIME->txtHeaders();
@@ -700,11 +698,12 @@ if ($store_target)
     }
   }
 
-  if ($olddraftmessageid)
-    {
+  if ($olddraftmessageid) {
     // delete previous saved draft
     $a_deleteid = $IMAP->search_once($CONFIG['drafts_mbox'],
         'HEADER Message-ID '.$olddraftmessageid, true);
+
+    if (!empty($a_deleteid)) {
       $deleted = $IMAP->delete_message($a_deleteid, $CONFIG['drafts_mbox']);
 
       // raise error if deletion of old draft failed
@@ -714,14 +713,14 @@ if ($store_target)
           'message' => "Could not delete message from ".$CONFIG['drafts_mbox']), TRUE, FALSE);
     }
   }
+}
 // remove temp file
 else if ($mailbody_file) {
   unlink($mailbody_file);
-  }
+}
 
 
-if ($savedraft)
-  {
+if ($savedraft) {
   $msgid = strtr($message_id, array('>' => '', '<' => ''));
 
   // remember new draft-uid
@@ -739,9 +738,8 @@ if ($savedraft)
   $OUTPUT->command('auto_save_start');
 
   $OUTPUT->send('iframe');
-  }
-else
-  {
+}
+else {
   rcmail_compose_cleanup($COMPOSE_ID);
 
   if ($store_folder && !$saved)
@@ -749,6 +747,4 @@ else
   else
     $OUTPUT->command('sent_successfully', 'confirmation', rcube_label('messagesent'));
   $OUTPUT->send('iframe');
-  }
-
-
+}