From 34e67bb5977049afb3e965b52b86ac12ea4899b4 Mon Sep 17 00:00:00 2001
From: Jung-uk Kim <jkim@FreeBSD.org>
Date: Thu, 11 Feb 2021 18:31:53 -0500
Subject: [PATCH] lex: Use NULL instead of 0 for pointers

Note araujo tried to fix it in r298241 but he only touched generated
files for bootstrap.  This commit properly fixes the problem.
---
 contrib/flex/src/scan.l | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/flex/src/scan.l b/contrib/flex/src/scan.l
index 1570f505b342..d01406ecdd4a 100644
--- a/contrib/flex/src/scan.l
+++ b/contrib/flex/src/scan.l
@@ -705,7 +705,7 @@ M4QEND      "]""]"
  			 }
 nmstr[yyleng - 2 - end_is_ws] = '\0';  /* chop trailing brace */
 
-			if ( (nmdefptr = ndlookup( nmstr )) == 0 )
+			if ( (nmdefptr = ndlookup( nmstr )) == NULL )
 				format_synerr(
 					_( "undefined definition {%s}" ),
 						nmstr );