- Fix a handle leak

 - Fix a handle leak
 - Fix a potential NULL pointer dereference if ExAllocatePool fails
 - Fix a potential NULL pointer dereference that causes AFD to crash when the socket is closed with waiting send IRPs
 - Fix another NULL pointer dereference if NdisOpenConfiguration fails
 - Move ASSERT before accessing Status
 - Add some sanity checks
 - Most of these were found by Amine Khaldi

svn path=/trunk/; revision=42659