- fix to buildin.c to prevent compiler from optimizing it out
- fix to realpath.c to handle case where 'path' is NULL
- fix to emacs.c (I think from dgk)
- fix to file.c (I think from gsf)
- fix to tail.c (I think from gsf)
- fix to code setting the malloc init hook (for vmalloc)
- changed memcpy to memmove in several places in sfio because src and dst
might overlap
- fixes to macros like FILE_defined to fix header file issues
- fixes to expr.h to handle macro definition issue