[PATCH] winebus: Reference PDOs added to DEVICE_RELATIONS structure.

[Piotr Caban]

Fixes crash caused by 81cda52d153.

Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/ntoskrnl.exe/tests/driver.c |  2 --
  dlls/winebus.sys/main.c          | 19 +++++++++++++++++++
  include/ddk/wdm.h                |  1 +
  3 files changed, 20 insertions(+), 2 deletions(-)