Fix atlas resource handling and suppression AI serialization

tests/test_terrain_presentation.py

@@ -121,8 +121,8 @@ struct string:std::string {
  void Replace(string a,string b){size_t n=0;while((n=find(a,n))!=npos){replace(n,a.size(),b);n+=b.size();}}
  string Trim(){auto a=find_first_not_of(" \r\n");if(a==npos)return "";return substr(a,find_last_not_of(" \r\n")-a+1);}
  string GetPath(){auto n=find('}');return n==npos?*this:string(substr(n+1));}
- bool IsExternal(){return size()>18&&front()=='{'&&at(17)=='}';}
- bool IsInternal(){return size()==18&&front()=='{'&&at(17)=='}';}
+ bool IsExternal(){assert(false && "Do not resolve a raw terrain path");return true;}
+ bool IsInternal(){assert(false && "Do not resolve a raw terrain path");return true;}
 };
 string StripPath(string s){auto n=s.find_last_of('/');return n==s.npos?s:string(s.substr(n+1));}
 template<class T>struct Array:std::vector<T>{void Insert(T v){this->push_back(v);}bool Contains(T v){return std::find(this->begin(),this->end(),v)!=this->end();}};