No real changes, just simplify wxBookCtrlBase unit test a little.

Add Realize() virtual function that can be overridden in ToolbookTestCase
instead of using explicit wxDynamicCasts.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74278 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/controls/toolbooktest.cpp

@@ -41,6 +41,8 @@ private:
     virtual wxEventType GetChangingEvent() const
     { return wxEVT_TOOLBOOK_PAGE_CHANGING; }
 
+    virtual void Realize() { m_toolbook->GetToolBar()->Realize(); }
+
     CPPUNIT_TEST_SUITE( ToolbookTestCase );
         wxBOOK_CTRL_BASE_TESTS();
         CPPUNIT_TEST( ToolBar );