jobserver_fds->list buffer overflow

[Ken Takusagawa]

In main.c we have

     jobserver_fds->list[0] = xmalloc ((sizeof ("1024")*2)+1);

     sprintf (jobserver_fds->list[0], "%d,%d", job_fds[0], job_fds[1]);

Shouldn't xmalloc get a "+2" instead of "+1"?  1 for the comma, and
one for the null terminator?

--ken