fixes memory corruption with multi-dimensional arrays

[YashasSamaga]

static const Test[2][][2] = { { { 9, 8 } }, { { 6, 7 } } };

The above code causes a memory corruption as the compiler does not
correctly calculate the size of the array.

This commit adds code to fix it.

[YashasSamaga]

I was thinking of removing that code from initials and moving it to calc_arraysize instead but this would execute some extra useless code every time (it calls itself? so it does the same checks over and over again). calc_arraysize is supposed to return 0 when it is not able to calculate the full size of the array but it doesn't when the dimensions are more than 2.

#84

[Zeex]

Thanks!