app: Fix compiler warnings
app: Fix compiler warnings

flaxandteal/gasket-vte,jessevdk/vte,rvu95/vte,rvu95/vte,jessevdk/vte,saitoha/vte-sixel,saitoha/vte-sixel,flaxandteal/gasket-vte,rvu95/vte,flaxandteal/gasket-vte,jessevdk/vte,rvu95/vte,jessevdk/vte,flaxandteal/gasket-vte,thestinger/vte-ng,thestinger/vte-ng,thestinger/vte-ng,saitoha/vte-sixel