Fix VarDecls for tuples. Closes #99. I've implemented it this way since it doesn't require any changes in the frontend. However, I think having TypeTuple expressed as LLVM struct types would make much more sense and open the door to tuple lvalues.

extern(C) int printf(char*, ...);

void main()
{
     int[0][10] arr;
     printf("%u\n", &arr[9] - &arr[0]);
     int[0] arr1;
     printf("%p\n", &arr1);
     void[0] arr2;
     printf("%p\n", &arr2);
}