Use malloc/realloc/free instead of the "near" counterparts. The

Use malloc/realloc/free instead of the "near" counterparts.  The
functions _nmalloc, _nrealloc, and _nfree don't seem to exist under win32
and the pointer manipulation is more complex than if we simply just use
the "normal" counterparts with a large-memory model build.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@9940 dc483132-0cff-0310-8789-dd5450dbe970