made wxTLW::SetIcon() non-virtual, it was already implemented in terms of

SetIcons() in most of the ports, now do it in all of them


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45322 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/toplevel.cpp

@@ -72,8 +72,6 @@ void wxTopLevelWindowMotif::PreDestroy()
 {
     wxModelessWindows.DeleteObject(this);
 
-    m_icons.m_icons.Empty();
-
     DestroyChildren();
 
     // MessageDialog and FileDialog do not have a client widget