Bug#869135: [giza] Bug in giza_print_id()

[Ole Streicher]

Dear giza developers,

we are currently considering to switch the pgplot Perl interface in
Debian to giza:

https://bugs.debian.org/869135

This however uncovered a bug in the giza_print_id() function (see the
url above for details): In the function, strcat(userid,date) is called
(line #59 of giza-print-id.c), with userid being either the string
returned by getlogin(), or the string constant "". Both is wrong, since
strcat() directly appends at the position of the first argument, which
needs to have enough space allocated to hold the result.

Could you have a look there?

Best regards

Ole