[Xcb] [PATCH libXau] Avoid heap corruption when calling XauFileName from multiple threads.

[Arnaud Fontaine]

Hello,

    >      const char *slashDotXauthority = "/.Xauthority";
    >      char    *name;
    > -    static char        *buf;
    > -    static int bsize;
    > +    static char        buf[PATH_MAX] = {0};

Please  don't use  PATH_MAX. According  to  POSIX, PATH_MAX  may not  be
defined if an implement does not  have any limitation on the path length
(and GNU Hurd does not actually define it). Many thanks.

Cheers,
Arnaud