Include wx/dataobj.h from wx/clipbrd.h.

This is necessary in order to define wxVector<wxDataFormat> at least when
wxVector is std::vector (as in wxUSE_STL==1 build) because vectors of
incomplete types can't be used.

Also removed inclusions of this and other unneeded headers from MSW and OS X
headers and removed a hopefully out of date comment about Mac code being wx
1.xx-based from the latter.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61485 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/clipbrd.h

@@ -14,10 +14,6 @@
 
 #if wxUSE_CLIPBOARD
 
-#include "wx/list.h"
-#include "wx/module.h"
-#include "wx/dataobj.h"     // for wxDataFormat
-
 // These functions superceded by wxClipboard, but retained in order to
 // implement wxClipboard, and for compatibility.
 
@@ -47,11 +43,8 @@ WXDLLIMPEXP_CORE bool wxGetClipboardFormatName(wxDataFormat dataFormat,
 // wxClipboard
 //-----------------------------------------------------------------------------
 
-class WXDLLIMPEXP_FWD_CORE wxDataObject;
 class WXDLLIMPEXP_CORE wxClipboard : public wxClipboardBase
 {
-    DECLARE_DYNAMIC_CLASS(wxClipboard)
-
 public:
     wxClipboard();
     virtual ~wxClipboard();
@@ -88,6 +81,8 @@ public:
 private:
     IDataObject *m_lastDataObject;
     bool m_isOpened;
+
+    DECLARE_DYNAMIC_CLASS(wxClipboard)
 };
 
 #endif // wxUSE_CLIPBOARD