replace dynamic_cast<> with wxDynamicCast

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57697 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/statbar.cpp

@@ -58,7 +58,7 @@ wxStatusBarBase::~wxStatusBarBase()
 {
     // notify the frame that it doesn't have a status bar any longer to avoid
     // dangling pointers
-    wxFrame *frame = dynamic_cast<wxFrame*>(GetParent());
+    wxFrame *frame = wxDynamicCast(GetParent(), wxFrame);
     if ( frame && frame->GetStatusBar() == this )
         frame->SetStatusBar(NULL);
 }