RE: d3d8: Fix the null condition in ApplyStateBlock

[Stefan Dösinger]

What would be interesting to know is which effect this has on the states,
but not in this patch I'd say, and not before the 1.0 release. In the long
run it might be an idea to port the d3d9:stateblock test to d3d8 and see how
d3d8 behaves