Suppress VC6 warnings about non-DLL-exported class for wxScrolled.

It's harmless to derive wxScrolledWindow from wxScrolled<> so suppress the
warnings about it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62472 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/scrolwin.h

@@ -404,11 +404,18 @@ private:
 
     // VC++ 6 gives warning for the declaration of template member function
     // without definition
-#if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
+#ifndef __VISUALC6__
     wxDECLARE_NO_COPY_CLASS(wxScrolled);
 #endif
 };
 
+#ifdef __VISUALC6__
+    // disable the warning about non dll-interface class used as base for
+    // dll-interface class: it's harmless in this case
+    #pragma warning(push)
+    #pragma warning(disable:4275)
+#endif
+
 // for compatibility with existing code, we provide wxScrolledWindow
 // "typedef" for wxScrolled<wxPanel>. It's not a real typedef because we
 // want wxScrolledWindow to show in wxRTTI information (the class is widely
@@ -430,4 +437,8 @@ public:
 
 typedef wxScrolled<wxWindow> wxScrolledCanvas;
 
+#ifdef __VISUALC6__
+    #pragma warning(pop)
+#endif
+
 #endif // _WX_SCROLWIN_H_BASE_