performance data not written when lacking performance data

[joe.price at vaisala.com]

>> So back on 3.2.3 I had a couple of checks with 'output' only, no
>> 'performance data'. 'Performance data' was still written to the file
>> specified, which was then processed by nagiosgraph.

> If there was no performance data, how could any be written?

Bah really bad wording... I meant...

>> I had a couple of checks with 'output' only, no
>> 'performance data'. 'output' was still written to
>> 'service_perfdata_file' (from nagios.cfg)
>> which was then processed by nagiosgraph.

> It should never have been relied on in the first place.

I shall resume sleeping at night, thanks!

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