Return number of atoms in a structure

structure.cpp

@@ -196,7 +196,6 @@ int Structure::next_structure(std::ifstream &ifs) {
   std::getline(ifs,line);
   if(line.empty()) return 0;
 
-  std::getline(ifs,line);
   std::getline(ifs,line);
   // the second line could be energy or
   // a scalling factors eweight fweight sweight