False positive "Comparison result is always the same" because of incorrect sizeof evaluation

**Description of the false positive**

CodeQL complains "Comparison is always true because i <= 1. "

However, it is really a loop over 4 elements.

I suspect the problem is that
```c
struct foo
{
...
unsigned long (*fnptr_array[4])(void);
...
};
```
describes an array of 4 function pointers, but that CodeQL isn't evaluating `sizeof` correctly on the type.

**Code samples or links to source code**

https://github.com/andyhhp/xtf/blob/f503efe8e5cf8858ec0704f1aaa82d0bf50891a5/tests/swint-emulation/main.c#L162-L162

but I've done a simpler example in https://godbolt.org/z/9fGr51r68 if that helps

**URL to the alert on GitHub code scanning (optional)**

https://github.com/andyhhp/xtf/security/code-scanning/55