Fix filter

Author: eldy

class/deploymentserver.class.php

@@ -1156,7 +1156,7 @@ public function getLastBackupDate($mode = '')
 		$sql .= " WHERE ce.fk_object = c.rowid";
 		$sql .= " AND ce.deployment_status IN ('done', 'processing')";
 		$sql .= " AND ce.deployment_host = '".$this->db->escape($this->ipaddress)."'";
-		$sql .= " AND ce.suspendmaintenance_message NOT LIKE 'http%'";	// Not a redirection instance
+		$sql .= " AND (ce.suspendmaintenance_message IS NULL OR ce.suspendmaintenance_message NOT LIKE 'http%')";	// Not a redirection instance
 		$sql .= " GROUP BY ce.latestbackup".$mode."_status";
 
 		$resql = $this->db->query($sql);