On: Stop Memsetting Structures

[Sharlin]

The literal `0` is guaranteed to be the null pointer value when used as a pointer, so by definition

    NULL == (void*)0.

But given

    void *p = 0; 
    intptr_t i = 0;

it is not guaranteed that `memcmp(&i, &p, sizeof(p)) == 0`.

[nybble41 → Sharlin]

> it is not guaranteed that `memcmp(&i, &p, sizeof(p)) == 0`.

Even less intuitively, it is not guaranteed that `(void*)i == p` since `i` is not an integer constant expression, even if the value is known to be 0.