ddraw: Fix Setmaterial with a test

[Vitaliy Margolen]

David Adam wrote:
>>David Adam wrote:
>>>/ The test succeded in my windows XP box.
> />>/ 
> />You have only ddraw test and no d3d test.
>>
>>Vitaliy.
> 
> Giving a NULL value to SetMaterial in d3d9 or d3d8 makes Windows crashes. 
> 
> It is a forbidden value (see bug 13646). So, no test can be performed for d3d8 and d3d9.
> 
> I sent a patch to removed these test earlier.
> 
So why are you adding the check that is not present on windows? What are th 
reasoning to have this if it clearly absent in native implementation?

Vitaliy.