Enable to delete the last column consistently in acme
since errorwin1 seems to handle the trick.

Reference: /n/sources/patch/applied/acme-delcol
Date: Mon Nov 15 17:19:14 CET 2004

--- /sys/src/cmd/acme/util.c	Mon Nov 15 17:19:14 2004
+++ /sys/src/cmd/acme/util.c	Mon Nov 15 17:19:14 2004
@@ -151,14 +151,6 @@
 	int owner, nr, q0, n;
 	Rune *r;
 
-	if(row.ncol == 0){	/* really early error */
-		rowinit(&row, screen->clipr);
-		rowadd(&row, nil, -1);
-		rowadd(&row, nil, -1);
-		if(row.ncol == 0)
-			error("initializing columns in flushwarnings()");
-	}
-
 	for(warn=warnings; warn; warn=next) {
 		w = errorwin(warn->md, 'E');
 		t = &w->body;