Implement platform independent solution for vaargs and va_list in printf/scanf

[JayFoxRox]

Currently, vaargs (... as parameter) and va_list seem to be platform dependent; I'm surprised the current approach works at all.

This primarily (only?) affects the following code:

NFSIISE/src/Wrapper.c

Lines 706 to 709 in fd87de0

	REALIGN int32_t vsprintf_wrap(char *s, const char *fmt, va_list arg)
	{
	return vsprintf(s, fmt, arg);
	}

NFSIISE/src/Wrapper.c

Lines 710 to 718 in fd87de0

	REALIGN int32_t fscanf_wrap(FILE *f, const char *fmt, ...)
	{
	int ret;
	va_list arg;
	va_start(arg, fmt);
	ret = vfscanf(f, fmt, arg);
	va_end(arg);
	return ret;
	}

The solution would be to manually implement these functions, so the arguments are popped correctly.

I've prototyped a solution:

REALIGN int32_t vsprintf_wrap(char *s, const char *fmt, va_list arg)
{
  uint32_t* args = (uint32_t*)arg;
  
  if (!strcmp(fmt, "LOW %-8s")) {
    char* a1 = args[0];
    return sprintf(s, fmt, a1);
  } else if (!strcmp(fmt, "HIGH %-7s")) {
    char* a1 = args[0];
    return sprintf(s, fmt, a1);
  } else {
    printf("Unhandled '%s'\n", fmt);
  }
  assert(false);
  return 0;
}

So this is similar how other functions are implemented (expecting specific input). However, it would also be possible to search for % (or full formatting options like %-8s) and parse only each format argument.