LiveWallpaper does not build

[Félix Piédallu]

Building with Vala 0.36.4:

[ 48%] Generating application.c, files-selector.c, key.c, keyfactory.c, main.c, plugin-parser.c, plugin-store.c, range-selector.c, search.c, lw-ui.c, plugin.c, config.c
/tmp/felix/yaourt-tmp-felix/aur-livewallpaper/src/livewallpaper-0.5.0/ui/config/files-selector.vala:58.27-58.28: error: Argument 1: Cannot pass value to reference or output parameter
            model.remove (it);
                          ^^
Compilation failed: 1 error(s), 0 warning(s)

model.remove (it);
should be replaced with
model.remove(ref it);