Skip memcache retrieval if the expiry time is defined as 0 (after all, we clearly don't want stale data)

include.mysql.php

@@ -65,7 +65,7 @@ class CachedPDO extends PDO
 		
 		$return_object = new stdClass;
 		
-		if($result = mc_get($cache_hash))
+		if($expiry != 0 && $result = mc_get($cache_hash))
 		{
 			$return_object->source = "memcache";
 			$return_object->data = $result;