Darwin fixes (OW,BCC,MinGW,DMC tested).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29822 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/confbase.h

@@ -117,7 +117,7 @@ public:
                long style = 0);
 
     // empty but ensures that dtor of all derived classes is virtual
-  virtual ~wxConfigBase(){};
+  virtual ~wxConfigBase();
 
   // path management
     // set current path: if the first character is '/', it's the absolute path,