Don't load more and more pages when filtering

app/src/main/java/de/danoeh/antennapod/fragment/AllEpisodesFragment.java

@@ -58,6 +58,7 @@ public class AllEpisodesFragment extends EpisodesListFragment {
         feedItemFilter = new FeedItemFilter(event.filterValues.toArray(new String[0]));
         SharedPreferences prefs = getActivity().getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
         prefs.edit().putString(PREF_FILTER, StringUtils.join(event.filterValues, ",")).apply();
+        page = 1;
         loadItems();
     }