#2 Calc fix

[Daniel Hawton]

When you're running a calculation with a number prior
to a ( or [, the number is completely ignored.

IE:
.calc 3(3)
returns 3
however, a .calc 3 * (3)
returns 9 like it's supposed to

This patch should fix the problem, although it may not
be the best approach.

[Daniel Hawton]