curl_xml plugin: Check for a curl_easy_perform() error first
authorDan Fandrich <dan@coneharvesters.com>
Wed, 6 Feb 2013 22:35:04 +0000 (23:35 +0100)
committerFlorian Forster <octo@collectd.org>
Sat, 16 Mar 2013 12:29:26 +0000 (13:29 +0100)
The value of CURLINFO_RESPONSE_CODE isn't valid otherwise.
Also, use the symbolic name CURLE_OK in all plugins where
appropriate.

Change-Id: I17ae9c7eea393ee4641296b5484c93809a662dd9
Signed-off-by: Florian Forster <octo@collectd.org>

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