structure: IndexedList: fix an assert which should be stricter
structure: IndexedList: fix an assert which should be stricter

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