fixes gh-12: warnings with -Wall (and compilation broken if -Werror).
fixes gh-12: warnings with -Wall (and compilation broken if -Werror).

machinekoder/QtQuickVcp,bobvanderlinden/QtQuickVcp,bobvanderlinden/QtQuickVcp,qtquickvcp/QtQuickVcp,machinekoder/QtQuickVcp,machinekoder/QtQuickVcp,JDSquared/QtQuickVcp,araisrobo/QtQuickVcp,qtquickvcp/QtQuickVcp,strahlex/QtQuickVcp,JDSquared/QtQuickVcp,JDSquared/QtQuickVcp,qtquickvcp/QtQuickVcp,qtquickvcp/QtQuickVcp,araisrobo/QtQuickVcp,jonnydee/nzmqt,araisrobo/QtQuickVcp,oskla129/nzmqt,strahlex/QtQuickVcp,bobvanderlinden/QtQuickVcp,strahlex/nzmqt,JDSquared/QtQuickVcp,araisrobo/QtQuickVcp,strahlex/QtQuickVcp,machinekoder/QtQuickVcp