Update cron_clean_mage_day.php

 diff:
                  --- 
                  +++ 
                  @@ -1,6 +1,8 @@
                   <?php
                   
                   // Author : Alex Sbille
                  +
                  +$parsed_magento_folders='';
                   
                   function clean_log_tables() {
                       global $db;
                  @@ -56,7 +58,7 @@
                   
                   $lines = shell_exec('find /home/ -maxdepth 6 -path \'*/app/etc/*\' -name \'local.xml\'  | xargs grep -l "Magento" > /tmp/listmagento.tmp');
                   $lines = file('/tmp/listmagento.tmp', FILE_IGNORE_NEW_LINES);
                  -print($lines);
                  +
                   foreach ($lines as $value) {
                   if(file_exists($value)) {