fix: wrong number

Author: alycejenni

ckanext/statistics/lib/download_statistics.py

@@ -244,10 +244,10 @@ def _get_vds_download(self, year=None, month=None, resource_id=None):
                 resource_type = self.resource_type(rid)
                 res_types.add(resource_type)
                 stats_dict[key][resource_type]['records'] += rc or 0
-            if len(res_types) > 0:
+            if len(res_types) > 1:
                 stats_dict[key]['mixed']['download_events'] += 1
             else:
-                stats_dict[key][res_types[0]]['download_events'] += 1
+                stats_dict[key][list(res_types)[0]]['download_events'] += 1
         return dict(stats_dict)
 
     @cache_region('statistics_long', 'dl_stats_gbif')