9fad2922fb
In this scenario drivers are adding a dummy attribute with a size of 1, so we should account for it here. Fixes missing window decorations with GTK4+. Reviewed-by: Juan A. Suarez <jasuarez@igalia.com> Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10853 Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28414>