int21/ax=7160/cl=1,2 must return an error if the file does not exist.
Fixes problems with FreeCOM mkdir not preserving the LFN directory name.


git-svn-id: https://dosemu.svn.sourceforge.net/svnroot/dosemu/trunk@1786 7758b857-130e-0410-ab9c-d8735a528d18