Fix event filter location and tags column mapping

src/Controller/Frontend/EventFilterController.php

@@ -87,12 +87,12 @@ class EventFilterController extends AbstractFrontendModuleController
 
         $rows = $this->connection->executeQuery(
             <<<'SQL'
-                SELECT t.id, t.tag, COUNT(DISTINCT r.item_id) AS total
+                                SELECT t.id, t.tag, COUNT(DISTINCT r.pid) AS total
                 FROM tl_tags_rel r
                 INNER JOIN tl_tags t ON t.id=r.tag_id
                 WHERE r.ptable='tl_calendar_events'
                   AND r.field='tags'
-                  AND r.item_id IN (?)
+                                    AND r.pid IN (?)
                 GROUP BY t.id, t.tag
                 ORDER BY t.tag ASC
             SQL,
@@ -128,9 +128,9 @@ class EventFilterController extends AbstractFrontendModuleController
             <<<'SQL'
                 SELECT l.id, l.title, COUNT(e.id) AS total
                 FROM tl_calendar_events e
-                INNER JOIN tl_location l ON l.id=e.location
+                                INNER JOIN tl_location l ON l.id=e.location_id
                 WHERE e.id IN (?)
-                  AND e.location>0
+                                    AND e.location_id>0
                 GROUP BY l.id, l.title
                 ORDER BY l.title ASC
             SQL,