Fixes #1314 Migration bug with variable declaration

modules/Migration/schema/600_to_610.php

@@ -705,7 +705,7 @@ echo "<br>Changed timezone column name for mail scanner";
 $result = $adb->pquery('SELECT task_id FROM com_vtiger_workflowtasks WHERE workflow_id IN
                         (SELECT workflow_id FROM com_vtiger_workflows WHERE module_name IN (?, ?))
                         AND task LIKE ?', array('Calendar', 'Events', '%VTSendNotificationTask%'));
-$numOfRowas = $adb->num_rows($result);
+$numOfRows = $adb->num_rows($result);
 for ($i = 0; $i < $numOfRows; $i++) {
         $tm = new VTTaskManager($adb);
         $task = $tm->retrieveTask($adb->query_result($result, $i, 'task_id'));