Fix index out of range in interpolateParams.
Fix index out of range in interpolateParams.

Fixes #467

helight/helight_code,helight/helight_code,methane/mysql,helight/helight_code,VividCortex/mysql,helight/helight_code,bookerzzz/mysql,methane/mysql,helight/helight_code,helight/helight_code,Go-SQL-Driver/MySQL,segmentio/mysql,segmentio/mysql,VividCortex/mysql,helight/helight_code,helight/helight_code,siriele/mysql,helight/helight_code,LightKool/mysql-go,go-sql-driver/mysql,LightKool/mysql-go,bookerzzz/mysql