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rio: place text at beginning of line before cursor and host point

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

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

@@ -493,8 +493,8 @@

 	rp = runefmtstrflush(&f);

 	nr = runestrlen(rp);

-	/* place text at beginning of line before cursor */

-	qline = w->q0;

+	/* place text at beginning of line before cursor and host point */

+	qline = min(w->qh, w->q0);

 	while(qline>0 && w->r[qline-1] != '\n')

 		qline--;