make sure there are no overflows
make sure there are no overflows

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