[SCSI] scsi_error: fix indentation and braces disagreement - add braces

...and the list of recent breakage goes on and on, this time
it's 242f9dcb

 (block: unify request timeout handling)
which broke it.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>