Bugfix: Don't crash when updating stats if no pages have any tags yet

Changelog.md

@@ -8,6 +8,7 @@ This file holds the changelog for Pepperminty Wiki. This is the master list of t
 ### Fixed
  - Fixed double-escaping of rendered HTML when nesting templates
  - Squashed a warning if the search index doesn't exist yet
+ - Fixed the stats updater if no pages in the system have tags yet
 
 ### Added
  - [Module API] Added new extra data system. See `parser-parsedown` and `page-edit` for an example.

modules/page-list.php

@@ -175,7 +175,7 @@ register_module([
 					$tag_counts[] = count($page_entry->tags ?? []);
 				
 				$result = new stdClass(); // value, state, completed
-				$result->value = round(array_sum($tag_counts) / count($tag_counts), 3);
+				$result->value = empty($tag_counts) ? -1 : round(array_sum($tag_counts) / count($tag_counts), 3);
 				$result->completed = true;
 				return $result;
 			}