calc_with_variables shouldn't allow vari instead of var i

[olafvdspek@…]

I think the example should show how to disallow vari instead of var i.

boost_1_39_0\libs\spirit\classic\example\fundamental\more_calculators\calc_with_variables.cpp:

vari

---

Parsing succeeded

---

vari Warning. You are attempting to re-declare a var.

---

Parsing failed stopped at: ": vari"

---

i = 5 push 5 assigning

---

Parsing succeeded

---

[Joel de Guzman]

Fixed. This may not be the best example for such, but it will do. Anyway, Spirit2 has better examples for this.