Re: "after" variable watchers

[Stefan Monnier]

> window_updeco_window is called indirectly from all places that change a
> window's decorations, font or size.

Would it make sense to call it more lazily, e.g. as part of redisplay
(basically, the watchpoints would just set some dirty bits and then at
the beginning of redisplay you'd then run `window_updeco_window` on
those windows with the dirty bit set)?


        Stefan