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rio: flushimage() improves your ability to see, i repeat twice.

--- a/sys/src/cmd/rio/rio.c

+++ b/sys/src/cmd/rio/rio.c

@@ -419,9 +419,9 @@

 		if(i != nil){

 			/* move it off-screen to hide it, since client is slow in letting it go */

 			originwindow(i, i->r.min, view->r.max);

+			freeimage(i);

+			flushimage(display, 1);

 		}

-		freeimage(i);

-		flushimage(display, 1);

 		free(s);

 	}

 }

--- a/sys/src/cmd/rio/wind.c

+++ b/sys/src/cmd/rio/wind.c

@@ -109,6 +109,7 @@

 	wsetselect(w, w->q0, w->q1);

 	wscrdraw(w);

 	wborder(w, Selborder);

+	flushimage(display, 1);

 	wsetname(w);

 	w->topped = ++topped;

 	w->resized = TRUE;

@@ -1126,7 +1127,6 @@

 		w->screenr = r;

 		strcpy(buf, w->name);

 		wresize(w, i);

-		flushimage(display, 1);

 		proccreate(deletetimeoutproc, estrdup(buf), 4096);

 		if(Dx(r)<=0){	/* window got hidden, if we had the input, drop it */

 			if(w==input)