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acme/Mail: require confirmation do Del a composing message

--- a/sys/src/cmd/upas/Mail/comp.c

+++ b/sys/src/cmd/upas/Mail/comp.c

@@ -97,7 +97,9 @@

 static void

 compquit(Comp *c, char **, int)

 {

-	c->quitting = 1;

+	if(c->quitting == 0)

+		fprint(2, "composing message\n");

+	c->quitting++;

 }

 static Fn compfn[] = {

@@ -119,13 +121,10 @@

 	c->quitting = 0;

 	c->qnext = mbox.opencomp;

 	mbox.opencomp = c;

-	fprint(c->ctl, "clean\n");

 	mbox.nopen++;

-	while(!c->quitting){

+	while(c->quitting < 2){

 		if(winevent(c, &ev) != 'M')

 			continue;

-		if(strcmp(ev.text, "Del") == 0)

-			break;

 		switch(ev.type){

 		case 'l':

 		case 'L':

-- 

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