add fsysclose for ext2
diff --git a/src/libdiskfs/ext2.c b/src/libdiskfs/ext2.c
index 25c21c8..6a55e20 100644
--- a/src/libdiskfs/ext2.c
+++ b/src/libdiskfs/ext2.c
@@ -41,6 +41,7 @@
 	fsys->_readfile = ext2readfile;
 	fsys->_readlink = ext2readlink;
 	fsys->_readdir = ext2readdir;
+	fsys->_close = ext2close;
 
 	if(ext2sync(fsys) < 0)
 		goto error;