issue #242: fix usort(): Returning bool from comparison function is deprecated

Author: dmitriim

classes/output/manageworkflows/renderable.php

@@ -201,7 +201,7 @@ public function query_db($pagesize, $useinitialsbar = true) {
         $workflows = \tool_trigger\workflow_manager::get_workflows_paginated($this->get_page_start(), $this->get_page_size());
         // Sort inactive arrays to the bottom.
         usort($workflows, function($a, $b) {
-            return ($a->active < $b->active);
+            return (int)($a->active < $b->active);
         });
         $this->rawdata = $workflows;
         // Set initial bars.