remove wxWindow::m_needParent and use GTKNeedsParent() which can be overridden in just wxMenuBar (and not set in each and every wxGTK control)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/toplevel.cpp

@@ -458,8 +458,6 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 
     wxTopLevelWindows.Append( this );
 
-    m_needParent = false;
-
     if (!PreCreation( parent, pos, size ) ||
         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
     {