Clean up some suspicious code. There's no guarantee a constant of integer type is a ConstantInt, so it's not safe to just cast<> these to ConstantInt. (It could be a constant expression, for example) The code is shorter this way too :).

module tangotests.vararg1;

import tango.stdc.stdio;

void func(int[] arr...)
{
    printf("1,2,4,5,6 == %d,%d,%d,%d,%d\n", arr[0],arr[1],arr[2],arr[3],arr[4]);
}

void main()
{
    func(1,2,4,5,6);
}