[NTVDM]
The value of USER_MEMORY_SIZE depends on FIRST_MCB_SEGMENT.



git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63287 97493ccd-5924-5043-b1f5-66cb403b36ce
[NTVDM]
Implement INT 21h function AH = 67h (Set Handle Count).



git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63288 97493ccd-5924-5043-b1f5-66cb403b36ce