[monitoring-plugins] Merge pull request #1262 from waja/fix_aix

[Sven Nierlein]

 Module: monitoring-plugins
 Branch: master
 Commit: 2438931a3fe7e600c6fe48b163125ea179faea73
 Author: Sven Nierlein <sven at nierlein.org>
   Date: Sat Jun 28 22:24:52 2014 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=2438931

Merge pull request #1262 from waja/fix_aix

Include common.h before any system headers.

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