Gcc 4 complained about a readlink() call in glob.c that had a NULL
buffer arg, so I checked the code, and it appears that the function
statfullpath() always returned 1 (missing file) for a symlink that
points nowhere.  This is due to the readlink() call with a zero-sized
buffer always returning -1 (on my system, at least).  The fix is to
supply a one-character buffer so that readlink() only returns a -1
when the file is totally missing or cannot be read.  Patch appended.

..wayne..