tweak to the new fopen mode constant names
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 853c162..0fc38dc 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -741,7 +741,7 @@
 			return FALSE;

 		}

 		

-		if (! $fp = @fopen($file, FOPEN_READ_WRITE_BOF))

+		if (! $fp = @fopen($file, FOPEN_READ_WRITE))

 		{

 			return FALSE;

 		}