btrfs: hide typecast to definition of BTRFS_SEND_TRANS_STUB

Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 7edfc7c..8b44630 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -5728,7 +5728,7 @@
 			NULL);
 	sort_clone_roots = 1;
 
-	current->journal_info = (void *)BTRFS_SEND_TRANS_STUB;
+	current->journal_info = BTRFS_SEND_TRANS_STUB;
 	ret = send_subvol(sctx);
 	current->journal_info = NULL;
 	if (ret < 0)