fixed rendering of empty bitmatrix
fixed rendering of empty bitmatrix

SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,Aksoom-Hussain/TouchDevelop,CodeKingdomsTeam/TouchDevelop,CodeKingdomsTeam/TouchDevelop,sedouard/TouchDevelop,sedouard/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,jle33/TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,Aksoom-Hussain/TouchDevelop,jmptrader/TouchDevelop,CodeKingdomsTeam/TouchDevelop,MetSystem/TouchDevelop,CodeKingdomsTeam/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,UIKit0/TouchDevelop,jmptrader/TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,ntoll/TouchDevelop,Aksoom-Hussain/TouchDevelop,ntoll/TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,jle33/TouchDevelop,MetSystem/TouchDevelop,UIKit0/TouchDevelop,ntoll/TouchDevelop,sedouard/TouchDevelop,jmptrader/TouchDevelop,jle33/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,UIKit0/TouchDevelop,jle33/TouchDevelop,jmptrader/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,MetSystem/TouchDevelop,jle33/TouchDevelop