clminibufev and resizeev are two globally defined event, and thus guaranteed to be zeroed. While OpenBSD' libevent1 is fine when calling event_pending on such events, libevent2 complains and, probably depending on which flags were used, crashes. Prompted and tested by Andrea Feletto, thanks!

we don't use wscrl (even though redraw_window could gain some speed by calling wscrl in some contexts)