wined3d: Only set valid transform states in wined3d_device_context_set_state().

dlls/wined3d/device.c

@@ -1750,6 +1750,7 @@ void CDECL wined3d_device_context_set_state(struct wined3d_device_context *conte
 
     for (i = 0; i < WINED3D_HIGHEST_TRANSFORM_STATE + 1; ++i)
     {
+        if (context->device->state_table[STATE_TRANSFORM(i)].representative)
             wined3d_device_context_emit_set_transform(context, i, state->transforms + i);
     }