GUI: Fix access to deleted widget after rebuilding a dialog

The issue was with the focus or mouse widget as it may not be a
direct child of the dialog (it may for example be a child of the tab
widget in the options dialog) and removing a widget was not
resetting the mouse of focus widget if that widget was not a
direct child.

1 files changed, 3 insertions, 3 deletions

diff --git a/gui/dialog.cpp b/gui/dialog.cpp
index 523227a237..d0e5755a59 100644
--- a/gui/dialog.cpp
+++ b/gui/dialog.cpp
@@ -361,11 +361,11 @@ Widget *Dialog::findWidget(const char *name) {
 }
 
 void Dialog::removeWidget(Widget *del) {
-	if (del == _mouseWidget)
+	if (del == _mouseWidget || del->containsWidget(_mouseWidget))
 		_mouseWidget = NULL;
-	if (del == _focusedWidget)
+	if (del == _focusedWidget || del->containsWidget(_focusedWidget))
 		_focusedWidget = NULL;
-	if (del == _dragWidget)
+	if (del == _dragWidget || del->containsWidget(_dragWidget))
 		_dragWidget = NULL;
 
 	GuiObject::removeWidget(del);