fix incorrect assert
fix incorrect assert

we are seeking forward, so the seek target should be >= the current position

Change-Id: Ic554565ae999213963b8c6cccfc6bb44c4c6652f
Reviewed-on: https://gerrit.dechocorp.com/5690
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@mozy.com>

adfin/mordor,mtanski/mordor,ccutrer/mordor,ccutrer/mordor,cgaebel/mordor,cgaebel/mordor,mozy/mordor,mtanski/mordor,mozy/mordor,mtanski/mordor,adfin/mordor,mozy/mordor,ccutrer/mordor,adfin/mordor