call Show(false) from ~wxDialog to call EndModal if the dialog is still modal consistently in all ports

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51562 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/dialog.cpp

@@ -71,11 +71,20 @@ bool wxDialog::Show( bool show )
 
     bool ret = wxWindow::Show( show );
 
-    if (show) InitDialog();
+    if (show)
+        InitDialog();
 
     return ret;
 }
 
+wxDialog::~wxDialog()
+{
+    m_isBeingDeleted = true;
+
+    // if the dialog is modal, this will end its event loop
+    Show(false);
+}
+
 bool wxDialog::IsModal() const
 {
     return m_modalShowing;