rio: resize flash patch

[Amavect <amavect@gmail.com>]

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All,

rio: don't redraw the text frame if a client is connected to /dev/mouse

When a window is resized, rio would redraw the text frame first before a 
client program is able to redraw, resulting in a flash.
An if statement masks the redraw.

Thanks,
Amavect

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diff -r a7cc619b0017 sys/src/cmd/rio/wind.c
--- a/sys/src/cmd/rio/wind.c	Tue Nov 17 18:37:38 2020 -0800
+++ b/sys/src/cmd/rio/wind.c	Sat Nov 21 22:14:39 2020 -0600
@@ -102,12 +102,14 @@
 	wsetcols(w, 1);
 	w->maxtab = maxtab*stringwidth(w->font, "0");
 	r = insetrect(w->i->r, Selborder);
-	draw(w->i, r, cols[BACK], nil, w->entire.min);
-	wfill(w);
-	wsetselect(w, w->q0, w->q1);
-	wscrdraw(w);
 	wborder(w, Selborder);
-	flushimage(display, 1);
+	if(!w->mouseopen){
+		draw(w->i, r, cols[BACK], nil, w->entire.min);
+		wfill(w);
+		wsetselect(w, w->q0, w->q1);
+		wscrdraw(w);
+		flushimage(display, 1);
+	}
 	wsetname(w);
 	w->topped = ++topped;
 	w->resized = TRUE;