restored wxPluginLibrary::ms_classes handling code that was removed by mistake

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25515 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dynload.h

@@ -93,6 +93,8 @@ private:
     size_t          m_objcount;     // ..and (pluggable) object instantiations.
     wxModuleList    m_wxmodules;    // any wxModules that we initialised.
 
+    void    UpdateClasses();        // Update ms_classes
+    void    RestoreClasses();       // Removes this library from ms_classes
     void    RegisterModules();      // Init any wxModules in the lib.
     void    UnregisterModules();    // Cleanup any wxModules we installed.