X53: fizzArray

Given a number n, create and return a new int array of length n, containing the numbers 0, 1, 2, ... n-1. The given n may be 0, in which case just return a length 0 array. You do not need a separate if statement for the length-0 case; the for loop should naturally execute 0 times in that case, so it just works. The syntax to make a new intarray is new int[desired_length].