Fix a couple of warnings
Fix a couple of warnings

jubalh/lxqt-panel,jubalh/lxqt-panel,DrTobe/lxqt-panel,stefonarch/lxqt-panel,jeremywh7/lxqt-panel,lxde/lxqt-panel,pmattern/lxqt-panel,rbazaud/lxqt-panel,stefonarch/lxqt-panel,DrTobe/lxqt-panel,Ilya87/lxqt-panel,jeremywh7/lxqt-panel,cferr/lxqt-panel,ThomasVie/lxqt-panel-de,stefonarch/lxqt-panel,ThomasVie/lxqt-panel-de,cferr/lxqt-panel,Ilya87/lxqt-panel,lxde/lxqt-panel,rbazaud/lxqt-panel,pmattern/lxqt-panel