Minor - fix php 7.0

main/inc/lib/events.lib.php

@@ -2439,7 +2439,7 @@ class Event
         // format returned by SQL for a subtraction of two datetime values
         // @todo make sure this is portable between DBMSes
         if (preg_match('/:/', $virtualTime)) {
-            [$h, $m, $s] = preg_split('/:/', $virtualTime);
+            list($h, $m, $s) = preg_split('/:/', $virtualTime);
             $virtualTime = $h * 3600 + $m * 60 + $s;
         } else {
             $virtualTime *= 3600;