From 504d0d1ae5aad221ab1e0e23f060f0ff5e6f103a Mon Sep 17 00:00:00 2001
From: peter1138 <peter1138@openttd.org>
Date: Wed, 28 May 2008 06:30:55 +0000
Subject: [PATCH] (svn r13305) -Fix (r13039): Confirmation window sent both yes
 and no answers instead of just yes.

---
 src/misc_gui.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index ac64a4fcc7..24829904c7 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -1208,6 +1208,8 @@ struct QueryWindow : public Window {
 				 * DeleteNonVitalWindows() to be called - we shouldn't be in a window then */
 				QueryCallbackProc *proc = this->proc;
 				Window *parent = this->parent;
+				/* Prevent the destructor calling the callback function */
+				this->proc = NULL;
 				delete this;
 				if (proc != NULL) {
 					proc(parent, true);