fix compiler warning
fix compiler warning

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