Fixes [Bug #670370] : Rulers 'zeros' position wrong.
Fixes [Bug #670370] : Rulers 'zeros' position wrong.

jakeclawson/Pinta,Mailaender/Pinta,Fenex/Pinta,PintaProject/Pinta,PintaProject/Pinta,Fenex/Pinta,Mailaender/Pinta,jakeclawson/Pinta,PintaProject/Pinta