updated websocket alias logic for in-dialog requests

kamailio/default.cfg

@@ -324,7 +324,7 @@ route[HANDLE_IN_DIALOG_REQUESTS]
         }
         if (loose_route()) {
             #!ifdef WEBSOCKETS-ROLE
-            if ($du == "") {
+            if ($du == $null) {
                 handle_ruri_alias();
                 switch ($rc) {
                 case -1:
@@ -332,10 +332,10 @@ route[HANDLE_IN_DIALOG_REQUESTS]
                     send_reply("400", "Bad request");
                     exit;
                 case 1:
-                    xlog("L_INFO", "$ci|log|routing in-dialog $rm from $fu to $du\n");
+                    xlog("L_INFO", "$ci|log|loose_route in-dialog message with alias $du");
                     break;
                 case 2:
-                    xlog("L_INFO", "$ci|log|routing in-dialog $rm from $fu to $ru\n");
+                    xlog("L_INFO", "$ci|log|loose_route in-dialog message with alias $du");
                     break;
                 }
             }