DSql: simplify field() method
DSql: simplify field() method

Nothing is taken away, it's just slight code rewrite to make it 30% shorter :)
atk4/atk4,svisystem/atk4,samratcis/atk4,samratcis/atk4,atk4/atk4,svisystem/atk4,samratcis/atk4,xepan/atk4,atk4/atk4,xepan/atk4,svisystem/atk4,atk4/atk4,xepan/atk4