[Bug 5668] Crash in IDirect3DViewportImpl_SetBackground

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5668

------- Additional Comments From [e-mail]  2006-20-08 16:15 -------
Some suggestions:

-> Can you check if This->ddraw->d3ddevice is != NULL in that function?
-> Add a NULL check for lpDirect3DDevice3 in 
IDirect3DMaterialImpl_GetHandle(material.c)
return DDERR_INVALIDPARAMS if the device is 0 in any case. I suspect that the 
app calls SetBackground without initializing a device before. It passes a 
random material handle because it can't have one without a device.