mark all dtors which are virtual because base class dtor is virtual explicitly virtual themselves

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41020 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/x11/evtloop.cpp

@@ -80,7 +80,7 @@ class wxSocketTable: public wxHashTable
     wxSocketTable(): wxHashTable(wxKEY_INTEGER)
     {
     }
-    ~wxSocketTable()
+    virtual ~wxSocketTable()
     {
         WX_CLEAR_HASH_TABLE(*this)
     }