Fix MSW compilation with wxUSE_DEFERRED_SIZING==0.

Add checks for wxUSE_DEFERRED_SIZING around the code using
wxWindow::m_pending{Size,Position}.

Closes #11348.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65066 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -1865,11 +1865,13 @@ void wxWindowMSW::DoGetPosition(int *x, int *y) const
     wxWindow * const parent = GetParent();
 
     wxPoint pos;
+#if wxUSE_DEFERRED_SIZING
     if ( m_pendingPosition != wxDefaultPosition )
     {
         pos = m_pendingPosition;
     }
     else // use current position
+#endif // wxUSE_DEFERRED_SIZING
     {
         RECT rect = wxGetWindowRect(GetHwnd());