Always write end record unless one has already been written.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51008 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/tarstrm.h

@@ -280,6 +280,7 @@ private:
     char *m_extendedHdr;
     size_t m_extendedSize;
     wxString m_badfit;
+    bool m_endrecWritten;
 
     DECLARE_NO_COPY_CLASS(wxTarOutputStream)
 };