Revert "Clang doesn't like that ToolPanelFactory::~ToolPanelFactory() is protected"

This reverts commit 504b6f0c, which was a
workaround for broken 5ea7e74c "fix some memory
leaks in sd" now fixed with 5ea6f6d4 "UNO objects
must be allocated on the heap."

sd/source/ui/toolpanel/ToolPanelFactory.cxx

@@ -91,6 +91,7 @@ namespace sd { namespace toolpanel
         // XInitialization
         virtual void SAL_CALL initialize( const Sequence< Any >& aArguments ) throw (Exception, RuntimeException);
 
+    protected:
         virtual ~ToolPanelFactory();
 
     private: