checksums.crc16: fix use of crc16-polynomial in the literal
checksums.crc16: fix use of crc16-polynomial in the literal

mrjbq7/factor,tgunr/factor,tgunr/factor,mrjbq7/factor,factor/factor,tgunr/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,factor/factor,factor/factor,factor/factor,factor/factor