Fix compiler warning on Linux as per https://code.google.com/p/psutil/issues/detail?id=404#c6
Fix compiler warning on Linux as per https://code.google.com/p/psutil/issues/detail?id=404#c6

jorik041/psutil,landryb/psutil,Q-Leap-Networks/psutil,tomprince/psutil,packages/psutil,mrjefftang/psutil,mindw/psutil,giampaolo/psutil,jamesblunt/psutil,mindw/psutil,tomprince/psutil,packages/psutil,cloudbase/psutil,qbit/psutil,mrjefftang/psutil,landryb/psutil,msarahan/psutil,landryb/psutil,mindw/psutil,0-wiz-0/psutil,mrjefftang/psutil,giampaolo/psutil,msarahan/psutil,landryb/psutil,qbit/psutil,landryb/psutil,tomprince/psutil,msarahan/psutil,tomprince/psutil,jamesblunt/psutil,tomprince/psutil,cloudbase/psutil,jorik041/psutil,0-wiz-0/psutil,jorik041/psutil,jamesblunt/psutil,packages/psutil,cloudbase/psutil,qbit/psutil,Q-Leap-Networks/psutil,mindw/psutil,mindw/psutil