wrong free in shishi_krberror_pretty_print

[Elrond]

Hi,

krberror.c, line 1199 (as in the debian/0.0.24 tar.gz)

Function shishi_krberror_pretty_print, first free() in this
function.

        res = shishi_krberror_etext(&buf);
        ...
        free(buf);

buf is not set, if shishi_krberror_etext fails.


Not to mention, that the previous use of
shishi_krberror_etext in this function looks a bit leaky.


    Elrond