Add wxGetFileType and IsSeekable

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31924 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/ffile.h

@@ -96,6 +96,8 @@ public:
   bool Error() const { return ferror(m_fp) != 0; }
     // get the file name
   const wxString& GetName() const { return m_name; }
+    // type such as disk or pipe
+  wxFileTypeEnum GetFileType() const { return wxGetFileType(m_fp); }
 
   // dtor closes the file if opened
   ~wxFFile() { Close(); }