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	Fix overtyping wide characters. - st - simple terminal
	git clone git://git.suckless.org/st
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	---
	commit 65f1dc428315ae9d7f362e10c668557c1379e7af
	parent a0467c802d4f86ed162486e3453dd61181423902
	Author: jamin <[email protected]>
	Date: Wed, 29 Dec 2021 09:07:17 -0800

	Fix overtyping wide characters.

	Overtyping the first half of a wide character with the
	second half of a wide character results in display garbage.
	This is because the trailing dummy is not cleaned up.

	i.e. ATTR_WIDE, ATTR_WDUMMY, ATTR_WDUMMY

	Here is a short script for demonstrating the behavior:

	#!/bin/sh
	alias printf=/usr/bin/printf
	printf こんにちは！; sleep 2
	printf '\x1b[5D'; sleep 2
	printf へ; sleep 2
	printf ' '; sleep 2
	echo

	Diffstat:
	M st.c \| 4 ++++

	1 file changed, 4 insertions(+), 0 deletions(-)
	---
	diff --git a/st.c b/st.c
	@@ -2507,6 +2507,10 @@ check_control_code:
	if (width == 2) {
	gp->mode \|= ATTR_WIDE;
	if (term.c.x+1 < term.col) {
	+ if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) {
	+ gp[2].u = ' ';
	+ gp[2].mode &= ~ATTR_WDUMMY;
	+ }
	gp[1].u = '\0';
	gp[1].mode = ATTR_WDUMMY;
	}