send the size event in SendSizeEvent() instead of posting it, otherwise we have no way to trigger immediate relayout; if we need delayed version we should add a separate PostSizeEvent()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54804 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/frame.cpp

@@ -316,7 +316,7 @@ void wxFrame::SendSizeEvent()
     {
         RECT r = wxGetWindowRect(GetHwnd());
 
-        (void)::PostMessage(GetHwnd(), WM_SIZE,
+        (void)::SendMessage(GetHwnd(), WM_SIZE,
                             IsMaximized() ? SIZE_MAXIMIZED : SIZE_RESTORED,
                             MAKELPARAM(r.right - r.left, r.bottom - r.top));
     }