d3dx9/tests: Fix comparison that expects NAN, since NAN != NAN.

[GOUJON Alexandre]

On 06/28/2011 10:59 AM, Tijl Coosemans wrote:
> On Tuesday 28 June 2011 00:40:09 Alexandre Julliard wrote:
>> Dylan Smith<dylan.ah.smith at gmail.com>  writes:
>>> @@ -4834,7 +4834,7 @@ static void test_create_skin_info(void)
>>>               for (i = 0; i<  num_influences; i++) {
>>>                   ok(exp_vertices[i] == vertices[i],
>>>                      "influence[%d]: expected vertex %u, got %u\n", i, exp_vertices[i], vertices[i]);
>>> -                ok(exp_weights[i] == weights[i],
>>> +                ok((isnan(exp_weights[i])&&  isnan(weights[i])) || exp_weights[i] == weights[i],
>> I put this in for now to fix the tests, but isnan() isn't really
>> portable, we should try to find a better way.
> You can replace isnan(x) with (x != x), but isnan is specified by the
> ISO C99 standard, so it should be portable.
"Wine adheres to standard C89/C90. Code should be written so that it 
works with as many compilers as possible, so you should avoid 
compiler-specific constructs, C99 and C++. "
from http://wiki.winehq.org/SubmittingPatches.