dlls/opengl32/wgl.c: minor dealloc fix

[Vitaliy Margolen]

DO NOT top post bottom posted emails!!!
Nick Burns wrote:
>> From: Stefan Dösinger <stefandoesinger at gmx.at>
>> To: wine-devel at winehq.org
>> CC: Nick Burns <adger44 at hotmail.com>
>> Subject: Re: dlls/opengl32/wgl.c: minor dealloc fix
>> Date: Mon, 1 Jan 2007 22:33:49 +0100
>>
>>
>> Am 01.01.2007 um 11:03 schrieb Nick Burns:
>>
>>> There can be a problem where the detach is hit before 
>>> internal_gl_extensions is allocated and it tries to free NULL and 
>>> dies...
>>>
>>> This just checks for the allocation before freeing -- very minor
>>>
>>> - Nick
>> HeapFree(GetProcessHeap(), 0, NULL) is supposed to be a nop, so the 
>> check is not needed.
> According to...
>    http://msdn2.microsoft.com/en-us/library/aa366701.aspx
>
> lpMem
>   [in] ...If this pointer is NULL, the behavior is undefined.

That's incorrect. 90% of MSDN is not correct or incomplete. The behavior
is well known and defined (at least in Wine) - NULL pointers are ignored.

So your patch is not correct.

Vitaliy.