message: Log gettext invocations exit codes on failure
diff: @@ -146,6 +146,10 @@ long DoExecuteGettext(const wxString& cmdline_, wxArrayString& gstderr)
  process->Redirect();
  long retcode = wxExecute(cmdline, wxEXEC_BLOCK | wxEXEC_NODISABLE | wxEXEC_NOEVENTS, process.get(), &env);
  + if (retcode != 0)
  + {
  + wxLogTrace("poedit.execute", " execution of command failed with exit code %d: %s", (int)retcode, cmdline.c_str());
  + }
  wxInputStream *std_err = process->GetErrorStream();
  if ( std_err && !ReadOutput(*std_err, gstderr) )
  