--- citydlg.c.orig	Thu Jan 25 18:56:37 2001
+++ citydlg.c	Thu Jan 25 18:58:56 2001
@@ -1707,7 +1707,7 @@
 
     pdialog->buy_shell=
     popup_message_dialog(pdialog->shell, /*"buynodialog"*/ _("Buy It!"), buf,
-			 _("Darn"), buy_callback_no, 0, 0);
+			 _("Darn"), buy_callback_no, pdialog, 0);
   }
 
   gtk_signal_connect(GTK_OBJECT(pdialog->buy_shell), "delete_event",