Do not return an error when setting a material to NULL.

dlls/ddraw/d3ddevice/mesa.c

@@ -787,8 +787,7 @@ GL_IDirect3DDeviceImpl_3_2T_SetLightState(LPDIRECT3DDEVICE3 iface,
 	    TRACE(" activating material %p.\n", mat);
 	    mat->activate(mat);
 	} else {
-	    ERR(" D3DLIGHTSTATE_MATERIAL called with NULL material !!!\n");
-	    return DDERR_INVALIDPARAMS;
+	    FIXME(" D3DLIGHTSTATE_MATERIAL called with NULL material !!!\n");
 	}
     } else if (dwLightStateType == D3DLIGHTSTATE_COLORMODEL /* 3 */) {
 	switch (dwLightState) {

dlls/ddraw/d3dexecutebuffer.c

@@ -197,7 +197,7 @@ static void execute(IDirect3DExecuteBufferImpl *This,
 			if (mat != NULL) {
 			    mat->activate(mat);
 			} else {
-			    ERR(" D3DLIGHTSTATE_MATERIAL called with NULL material !!!\n");
+			    FIXME(" D3DLIGHTSTATE_MATERIAL called with NULL material !!!\n");
 			}
 		    }
 		   else if (ci->u1.dlstLightStateType == D3DLIGHTSTATE_COLORMODEL /* 3 */) {

dlls/ddraw/d3dlight.c

@@ -194,7 +194,7 @@ GL_IDirect3DLightImpl_1_Release(LPDIRECT3DLIGHT iface)
     
     TRACE("(%p/%p)->() decrementing from %lu.\n", This, iface, This->ref);
     if (!--(This->ref)) {
-        ((IDirect3DGLImpl *) This->d3d)->light_released(This->d3d, glThis->light_num);
+        ((IDirect3DGLImpl *) This->d3d->d3d_private)->light_released(This->d3d, glThis->light_num);
         HeapFree(GetProcessHeap(), 0, This);
 	return 0;
     }

dlls/ddraw/direct3d/mesa.c

@@ -82,7 +82,7 @@ GL_IDirect3DImpl_3_2T_1T_CreateLight(LPDIRECT3D3 iface,
 				     IUnknown* pUnkOuter)
 {
     ICOM_THIS_FROM(IDirectDrawImpl, IDirect3D3, iface);
-    IDirect3DGLImpl *glThis = (IDirect3DGLImpl *) This;
+    IDirect3DGLImpl *glThis = (IDirect3DGLImpl *) This->d3d_private;
     int fl;
     IDirect3DLightImpl *d3dlimpl;
     HRESULT ret_value;
@@ -292,7 +292,7 @@ GL_IDirect3DImpl_7_3T_CreateVertexBuffer(LPDIRECT3D7 iface,
 
 static void light_released(IDirectDrawImpl *This, GLenum light_num)
 {
-    IDirect3DGLImpl *glThis = (IDirect3DGLImpl *) This;
+    IDirect3DGLImpl *glThis = (IDirect3DGLImpl *) This->d3d_private;
     glThis->free_lights |= (light_num - GL_LIGHT0);
 }