ntdll/file.c: Fix a possible NULL dereferencing.

[Nikolay Sivov]

Henri Verbeet wrote:
> 2008/8/27 Nikolay Sivov <bunglehead at gmail.com>:
>   
>> Markus Hitter wrote:
>>     
>>> if (!attr || !attr->ObjectName) return STATUS_INVALID_PARAMETER;
>>>       
>> Shouldn't this be splitted? It isn't safe to rely on evaluation order.
>> Or is it a default compiler setting for us?
>>
>>     
> This is well defined in C. !attr will be evaluated first, and if it
> evaluates to true, the rest of the condition won't be evaluated. This
> is also known as short-circuit evaluation.
>
>   
I thought it's possible to override this: not a evaluation order of 
course but the completeness of
evaluation for debug purpose.