Use explicit Any::downcast_ref to fix 1.21 compilation
Use explicit Any::downcast_ref to fix 1.21 compilation

Smithay/wayland-rs,vberger/wayland-client-rs,Smithay/wayland-rs,vberger/wayland-rs,vberger/wayland-client-rs,vberger/wayland-client-rs,vberger/wayland-rs