fuse: fix mtime update error in fsync

Bad case of shadowing.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 982288a..7ae1e69 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -501,7 +501,7 @@
 	fuse_sync_writes(inode);
 
 	if (test_bit(FUSE_I_MTIME_DIRTY, &get_fuse_inode(inode)->state)) {
-		int err = fuse_flush_mtime(file, false);
+		err = fuse_flush_mtime(file, false);
 		if (err)
 			goto out;
 	}