desktop-shell: Fix some indents
desktop-shell: Fix some indents

jonnylamb/weston,Fantu/compositor-spice,Fantu/compositor-spice,mchalupa/weston,kwm81/weston,xorgy/weston,Gnurou/weston,krezovic/weston,giucam/weston,udoprog/weston,eyolfson/weston,eyolfson/weston,Tarnyko/weston-xdg_surface_present,sir-murray/weston,Tarnyko/weston-xdg_surface_present,mchalupa/weston,xorgy/weston,jonnylamb/weston,Fantu/compositor-spice,Gnurou/weston,udoprog/weston,krezovic/weston,kwm81/weston,sir-murray/weston,giucam/weston