[SCSI] qla4xxx: fix up residual handling
the check in the residual case has an incorrect test of scsi_status (the logic is reversed, it should be scsi_status != 0 instead of !scsi_status. Since we checked a few lines above that scsi_status was non-zero, just eliminate this test Signed-off-by: NDavid C Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
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