get rid of old go-ism of needing to return an explicit nil after an error
get rid of old go-ism of needing to return an explicit nil after an error

beni55/sqlx,snikch/sqlx,cortex/sqlx,StabbyCutyou/sqlx,wmydz1/sqlx,proteneer/sqlx,johnsto/sqlx,aiyi/sqlx,jmoiron/sqlx,larsth/sqlx,adcaes/sqlx,outrightmental/go-sqlx