structure: CAvl: add assertion against count overflow
structure: CAvl: add assertion against count overflow


chrisballinger/badvpn,LazyZhu/badvpn,PowerOlive/badvpn,chrisballinger/badvpn,tempbottle/badvpn,Git-Host/badvpn,Git-Host/badvpn,binondord/badvpn,tempbottle/badvpn,linfengfeiye/badvpn,LazyZhu/badvpn,Git-Host/badvpn,PowerOlive/badvpn,linfengfeiye/badvpn,PowerOlive/badvpn,chrisballinger/badvpn,tempbottle/badvpn,binondord/badvpn,linfengfeiye/badvpn,tempbottle/badvpn,PowerOlive/badvpn,linfengfeiye/badvpn,PowerOlive/badvpn,linfengfeiye/badvpn,LazyZhu/badvpn,tempbottle/badvpn,binondord/badvpn,binondord/badvpn,Git-Host/badvpn,binondord/badvpn,LazyZhu/badvpn,LazyZhu/badvpn,chrisballinger/badvpn,Git-Host/badvpn