message: Fix version check display
diff: #ifdef HAVE_SPARKLE_SUPPORT
  #include "auto-update-service.h"
  +#endif
  namespace {
  } // namespace
  -#endif
  AboutDialog::AboutDialog(QWidget *parent)
  : QDialog(parent)
  @@ -34,11 +34,12 @@ AboutDialog::AboutDialog(QWidget *parent)
  connect(mOKBtn, SIGNAL(clicked()), this, SLOT(close()));
  + mCheckUpdateBtn->setVisible(false);
  #ifdef HAVE_SPARKLE_SUPPORT
  + if (AutoUpdateService::instance()->shouldSupportAutoUpdate()) {
  mCheckUpdateBtn->setVisible(true);
  connect(mCheckUpdateBtn, SIGNAL(clicked()), this, SLOT(checkUpdate()));
  -#else
  - mCheckUpdateBtn->setVisible(false);
  + }
  #endif
  }
  