fixing 1736334

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@46453 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/window.cpp

@@ -1245,6 +1245,8 @@ void wxWindowMac::DoSetWindowVariant( wxWindowVariant variant )
 void wxWindowMac::MacUpdateControlFont()
 {
     m_peer->SetFont( GetFont() , GetForegroundColour() , GetWindowStyle() ) ;
+    // do not trigger refreshes upon invisible and possible partly created objects
+    if ( MacIsReallyShown() )
         Refresh() ;
 }
 
@@ -2141,6 +2143,8 @@ void wxWindowMac::SetLabel(const wxString& title)
     if ( m_peer && m_peer->Ok() )
         m_peer->SetLabel( m_label ) ;
 
+    // do not trigger refreshes upon invisible and possible partly created objects
+    if ( MacIsReallyShown() )
         Refresh() ;
 }