cmd: Avoid mixing signed and unsigned type in conditional expression

[Frédéric Delanoy]

2011/10/27 Frédéric Delanoy <frederic.delanoy at gmail.com>:
> On Thu, Oct 27, 2011 at 08:38, Eric Pouech <eric.pouech at orange.fr> wrote:
>> why do we check for ptr being null or not, when we deref ptr one line above?
>
>>>       if (*ptr == '\n') ptr++;
>>> -      WCMD_output_asis_len(message, (ptr) ? ptr - message :
>>> strlenW(message), handle);
>>> +      WCMD_output_asis_len(message, (ptr) ? (DWORD)(ptr - message) :
>>> strlenW(message), handle);
>>>       if (ptr) {
>>>         numChars = 0;
>>>         if (++line_count >= max_height - 1) {
>
> It's dereferenced but incremented afterwards, so might be null after that line

Of course if (*ptr != '\n') the check is unnecessary. I guess the
original author simply wanted to merge both cases. Might need some
reorganization, but that's probably outside of the scope of this patch