delete controls which are part of the calendar (even if they're siblings to it and not its children) when the calender itself is deleted

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43526 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/calctrl.cpp

@@ -256,6 +256,14 @@ wxCalendarCtrl::~wxCalendarCtrl()
     {
         delete m_attrs[n];
     }
+
+    if ( !HasFlag(wxCAL_SEQUENTIAL_MONTH_SELECTION) )
+    {
+        delete m_comboMonth;
+        delete m_staticMonth;
+        delete m_spinYear;
+        delete m_staticYear;
+    }
 }
 
 void wxCalendarCtrl::SetWindowStyleFlag(long style)