libshp: посчитать число вершин двумя способами (ошибка)

1.
  int count;
  count = 0;
  for (i = 0; i < nEntities; i++) {
    SHPObject *pObj;
    pObj = SHPReadObject (h, i);
    count += pObj->nVertices;
  }
  printf ("count of vertices: %d\n", count);

2.
  int n;
  n = 0;
  for (i = 0; i < nEntities; i++) {
    SHPObject *pObj;
    pObj = SHPReadObject (h, i);
    for (j = 0; j < pObj->nVertices-1; j++,n++);
  }
  printf ("n: %d\n", n);