Use wxDynamicCast() instead of IsKindOf() checks.

wxDynamicCast() is less verbose (due to the absence of "CLASSINFO") and more
compatible with the standard dynamic_cast<>, so prefer to use it when possible.

See #14356.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71624 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/laywin.cpp

@@ -238,7 +238,7 @@ bool wxLayoutAlgorithm::LayoutWindow(wxWindow* parent, wxWindow* mainWindow)
 
     int leftMargin = 0, rightMargin = 0, topMargin = 0, bottomMargin = 0;
 #if wxUSE_SASH
-    if (parent->IsKindOf(CLASSINFO(wxSashWindow)))
+    if (wxDynamicCast(parent, wxSashWindow))
     {
         wxSashWindow* sashWindow = (wxSashWindow*) parent;