use MAP_INVALID_UTF8_TO_PUA instead of MAP_INVALID_UTF8_TO_OCTAL in wxMimeTextFile to avoid quoting backslashes (which occur naturally in MIME files) in Unicode builds

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43862 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/mimetype.cpp

@@ -152,7 +152,7 @@ protected:
     virtual bool OnRead(const wxMBConv& WXUNUSED(conv))
     {
         return wxTextFile::OnRead(
-                    wxMBConvUTF8(wxMBConvUTF8::MAP_INVALID_UTF8_TO_OCTAL));
+                    wxMBConvUTF8(wxMBConvUTF8::MAP_INVALID_UTF8_TO_PUA));
     }
 };