Only show waiting on me filter if there are things in it

api/src/com/todoroo/andlib/data/DatabaseDao.java

@@ -440,4 +440,13 @@ public class DatabaseDao<TYPE extends AbstractModel> {
         cursor.moveToFirst();
         return new TodorooCursor<TYPE>(cursor, properties);
     }
+
+    public int count(Query query) {
+        TodorooCursor<TYPE> cursor = query(query);
+        try {
+            return cursor.getCount();
+        } finally {
+            cursor.close();
+        }
+    }
 }

astrid/plugin-src/com/todoroo/astrid/core/CoreFilterExposer.java

@@ -63,7 +63,8 @@ public final class CoreFilterExposer extends BroadcastReceiver implements Astrid
         if (Preferences.getBoolean(R.string.p_show_today_filter, true))
             filters.add(getTodayFilter(r));
 
-        if (Preferences.getBoolean(R.string.p_show_waiting_on_me_filter, true))
+        if (Preferences.getBoolean(R.string.p_show_waiting_on_me_filter, true) &&
+                PluginServices.getWaitingOnMeDao().count(Query.select(WaitingOnMe.ID).where(WaitingOnMe.DELETED_AT.eq(0))) > 0);
             filters.add(getWaitingOnMeFilter(r));
 
         // transmit filter list

astrid/src/com/todoroo/astrid/service/TaskService.java

@@ -352,12 +352,7 @@ public class TaskService {
      * @return how many tasks are matched by this query
      */
     public int count(Query query) {
-        TodorooCursor<Task> cursor = taskDao.query(query);
-        try {
-            return cursor.getCount();
-        } finally {
-            cursor.close();
-        }
+        return taskDao.count(query);
     }
 
     /**