Fix scrolling bug where client size was reported wrong

when the scrollbar size was not subtracted when
    using a targetwindow != this.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41291 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -3019,9 +3019,7 @@ void wxWindowGTK::DoGetClientSize( int *width, int *height ) const
         int dh = 0;
 
         if (m_hasScrolling)
-        {
             GetScrollbarWidth(m_widget, dw, dh);
-        }
 
 #ifndef __WXUNIVERSAL__
         if (HasFlag(wxRAISED_BORDER) || HasFlag(wxSUNKEN_BORDER))