io-wq: fix error path leak of buffered write hash map

The 'err' path should include the hash put, we already grabbed a reference
once we get that far.

Fixes: e941894eae31 ("io-wq: make buffered file write hashed work map per-ctx")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed