cuse: fix broken release

The inode parameter in cuse_release() is likely *not* a fuse inode.  It's a
small wonder it didn't blow up until now.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/fuse/cuse.c

@@ -142,11 +142,10 @@ static int cuse_open(struct inode *inode, struct file *file)
 
 static int cuse_release(struct inode *inode, struct file *file)
 {
-	struct fuse_inode *fi = get_fuse_inode(inode);
 	struct fuse_file *ff = file->private_data;
 	struct fuse_conn *fc = ff->fc;
 
-	fuse_sync_release(fi, ff, file->f_flags);
+	fuse_sync_release(NULL, ff, file->f_flags);
 	fuse_conn_put(fc);
 
 	return 0;