Fixes undefined variable error due to variable being placed in try bl…

…ock, but being used in finally section (#22963)

* Fixes undefined variable error

* Applied PR suggestion

plugins/ScheduledReports/API.php

@@ -410,6 +410,7 @@ public function generateReport(
 
         $originalShowEvolutionWithinSelectedPeriod = Config::getInstance()->General['graphs_show_evolution_within_selected_period'];
         $originalDefaultEvolutionGraphLastPeriodsAmount = Config::getInstance()->General['graphs_default_evolution_graph_last_days_amount'];
+        $initialFilterTruncate = Common::getRequestVar('filter_truncate', false);
         try {
             Config::setSetting('General', 'graphs_show_evolution_within_selected_period', (bool)$report['evolution_graph_within_period']);
             Config::setSetting('General', 'graphs_default_evolution_graph_last_days_amount', $report['evolution_graph_period_n']);
@@ -427,7 +428,6 @@ public function generateReport(
 
             // the report will be rendered with the first 23 rows and will aggregate other rows in a summary row
             // 23 rows table fits in one portrait page
-            $initialFilterTruncate = Common::getRequestVar('filter_truncate', false);
             $_GET['filter_truncate'] = Config::getInstance()->General['scheduled_reports_truncate'];
 
             $prettyDate = null;