[cups.bugs] [MOD] STR #3253: Avoid crashing on bad job control files

[twaugh.redhat]

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[STR New]

While debugging a cupsd crash I found that the return value of
cupsdLoadJobs() is not checked before the job is added to the Jobs array,
both in load_job_cache() and in load_request_root().

Here is a patch to fix that.

The original bug report is here:
  https://bugzilla.redhat.com/show_bug.cgi?id=509741
including the actual job control file that caused the crash (c00004).  The
problem with the file is that job-printer-uri='file:/dev/null'.  I haven't
discovered how that might have happened.

Link: http://www.cups.org/str.php?L3253
Version: 1.4rc1
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