Use wxConvAuto in wxFile::Write().

For consistency with wxFFile.

No real change, as wxConvAuto will default to UTF-8 when writing.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74434 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/file.h

@@ -77,7 +77,7 @@ public:
     // returns the number of bytes written
   size_t Write(const void *pBuf, size_t nCount);
     // returns true on success
-  bool Write(const wxString& s, const wxMBConv& conv = wxMBConvUTF8());
+  bool Write(const wxString& s, const wxMBConv& conv = wxConvAuto());
     // flush data not yet written
   bool Flush();