videodb: fix smart playlists not honoring "Show empty TV shows" setting.

Looks like moving the setting check from GetTvShowsByWhere to GetTvShowsNav in
PR 5752 broke smart playlists as they were previously honoring the advanced
setting (hideemptyseries) and then the GUI one.
Previous behavior is restored by adding additional logic in GetItems.

xbmc/video/VideoDatabase.cpp

@@ -6216,7 +6216,12 @@ bool CVideoDatabase::GetItems(const std::string &strBaseDir, VIDEODB_CONTENT_TYP
   if (StringUtils::EqualsNoCase(itemType, "movies") && (mediaType == VIDEODB_CONTENT_MOVIES || mediaType == VIDEODB_CONTENT_MOVIE_SETS))
     return GetMoviesByWhere(strBaseDir, filter, items, sortDescription);
   else if (StringUtils::EqualsNoCase(itemType, "tvshows") && mediaType == VIDEODB_CONTENT_TVSHOWS)
-    return GetTvShowsByWhere(strBaseDir, filter, items, sortDescription);
+  {
+    Filter filter2(filter);
+    if (!CSettings::GetInstance().GetBool(CSettings::SETTING_VIDEOLIBRARY_SHOWEMPTYTVSHOWS))
+      filter2.AppendWhere("totalCount IS NOT NULL AND totalCount > 0");
+    return GetTvShowsByWhere(strBaseDir, filter2, items, sortDescription);
+  }
   else if (StringUtils::EqualsNoCase(itemType, "musicvideos") && mediaType == VIDEODB_CONTENT_MUSICVIDEOS)
     return GetMusicVideosByWhere(strBaseDir, filter, items, true, sortDescription);
   else if (StringUtils::EqualsNoCase(itemType, "episodes") && mediaType == VIDEODB_CONTENT_EPISODES)