[NTOSKRNL]
Properly compute file name length for output buffer
CORE-2582


git-svn-id: svn://svn.reactos.org/reactos/trunk@62484 97493ccd-5924-5043-b1f5-66cb403b36ce
[FASTFAT]
Also cleanup ongoing notifications during cleanup.

This fixes kernel32:change winetests crash.
This gets us from 300 tests executed, 134 failed to 312 executed, 33 failed.

CORE-2582


git-svn-id: svn://svn.reactos.org/reactos/trunk@62485 97493ccd-5924-5043-b1f5-66cb403b36ce