EMM fixes:
- handle name is 8 bytes ASCII, but dosemu stores it as ASCIIZ, therefore
9 bytes must be reserved.
- Fix usage of NULL_PAGE, it is not a handle.


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@544 7758b857-130e-0410-ab9c-d8735a528d18