structure: BStringTrie: fix integer overflow when casting size_t to int
structure: BStringTrie: fix integer overflow when casting size_t to int

ambrop72/badvpn-googlecode-export,arevindh/badvpn,bakhet/badvpn,Qnex93/badvpn,bawaaaaah/badvpn,bawaaaaah/badvpn,henryhwang/badvpn,nuwaf/badvpn,walterDurin/badvpn,atavism/badvpn,adelshokhy112/badvpn,walterDurin/badvpn,kaliii/badvpn,bakhet/badvpn,bakhet/badvpn,fffw/badvpn,arevindh/badvpn,nuwaf/badvpn,henryhwang/badvpn,kaliii/badvpn,kaliii/badvpn,nuwaf/badvpn,Qnex93/badvpn,fragmede/badvpn,adelshokhy112/badvpn,bawaaaaah/badvpn,ambrop72/badvpn-googlecode-export,fffw/badvpn,Rastii/badvpn,Qnex93/badvpn,atavism/badvpn,fffw/badvpn,fragmede/badvpn,atavism/badvpn,ambrop72/badvpn-googlecode-export,kaliii/badvpn,adelshokhy112/badvpn,bakhet/badvpn,walterDurin/badvpn,adelshokhy112/badvpn,walterDurin/badvpn,bawaaaaah/badvpn,henryhwang/badvpn,Qnex93/badvpn,nuwaf/badvpn,adelshokhy112/badvpn,bakhet/badvpn,arevindh/badvpn,atavism/badvpn,Rastii/badvpn,walterDurin/badvpn,fffw/badvpn,Rastii/badvpn,henryhwang/badvpn,arevindh/badvpn,fffw/badvpn,henryhwang/badvpn,fragmede/badvpn,nuwaf/badvpn,atavism/badvpn,fragmede/badvpn,Rastii/badvpn,fragmede/badvpn,ambrop72/badvpn-googlecode-export,ambrop72/badvpn-googlecode-export,bawaaaaah/badvpn,Rastii/badvpn,kaliii/badvpn,arevindh/badvpn,Qnex93/badvpn