Disable reporting when game id is missing.

We can't track compatibility without a game id.  That either means
inventing one for homebrew (one that is consistent for all copies) or not
reporting homebrew.

UI/PauseScreen.cpp

@@ -331,7 +331,7 @@ void GamePauseScreen::CreateViews() {
 
 	// TODO, also might be nice to show overall compat rating here?
 	// Based on their platform or even cpu/gpu/config.  Would add an API for it.
-	if (Reporting::IsEnabled()) {
+	if (Reporting::IsEnabled() && gameId.size() && gameId != "_") {
 		I18NCategory *rp = GetI18NCategory("Reporting");
 		rightColumnItems->Add(new Choice(rp->T("ReportButton", "Report Feedback")))->OnClick.Handle(this, &GamePauseScreen::OnReportFeedback);
 	}