[MiNT] PATH_MAX in mintlib

["Roger Burrows" <anodyne@cyberus.ca>]

Hi!
While browsing the mintlib sources (0.57.6), I noticed that PATH_MAX was 128.  
This mostly seems to be used in conjunction with _unx2dos()/_dos2unx(), so I 
suppose that for a TOS FAT16 filesystem, this may not be a real problem.

However symbolic link support (symlink/readlink) also uses PATH_MAX as the 
maximum symlink size:

1. symlink.c: if we try to create a symbolic link > 128 bytes, a truncated 
value will be stored in the link.

2. readlink.c: fails if a symbolic link is more than 128 bytes long.

Roger Burrows