disk plugin: Declare alt_name only when libudev is available.
authorFlorian Forster <octo@collectd.org>
Fri, 18 Dec 2015 10:11:15 +0000 (11:11 +0100)
committerFlorian Forster <octo@collectd.org>
Fri, 18 Dec 2015 10:11:15 +0000 (11:11 +0100)
Coverity whines about "output_name = alt_name" being dead code because
it sees alt_name as beeing NULL always.

CID: 48417


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