double unlock in aac_fib_send()

[Dan Carpenter <error27@xxxxxxxxx>]

This is from drivers/scsi/aacraid/commsup.c (2.6.30-rc1)
   518                  } else if (down_interruptible(&fibptr->event_wait)) {
   519                          fibptr->done = 2;
   520                          up(&fibptr->event_wait);
   521                  }

down_interruptible() returns zero if it aquires the lock or -EINTR on 
failure.  Since we failed to aquire the lock there is no need to call up() 
on line 520.

Found by smatch (http://repo.or.cz/w/smatch.git).

regards,
dan carpenter
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