Added CI_ Prefix to the Cache driver.
diff --git a/system/libraries/Cache/drivers/Cache_dummy.php b/system/libraries/Cache/drivers/Cache_dummy.php
index 74f6892..de47acb 100644
--- a/system/libraries/Cache/drivers/Cache_dummy.php
+++ b/system/libraries/Cache/drivers/Cache_dummy.php
@@ -25,7 +25,7 @@
  * @link		
  */
 
-class Cache_dummy extends CI_Driver {
+class CI_Cache_dummy extends CI_Driver {
 
 	/**
 	 * Get