[ros-svn] [hpoussin] 20103: Fix the case when IRP_MN_QUERY_DEVICE_TEXT returns nothing

[hpoussin at svn.reactos.com]

Fix the case when IRP_MN_QUERY_DEVICE_TEXT returns nothing
Set DN_DRIVER_LOADED and DN_STARTED flags


Updated files:
trunk/reactos/ntoskrnl/io/device.c
trunk/reactos/ntoskrnl/io/pnpmgr.c
trunk/reactos/ntoskrnl/io/pnproot.c