From 2e0e563124d3b1b279c4242927d1786e43303a0f Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sat, 23 Feb 2008 19:23:33 +0000
Subject: [PATCH] Avoid trying to print a NULL char pointer in
 --describe-config.  On some platforms this works, but on some it crashes. 
 Zdenek Kotala

---
 src/backend/utils/misc/help_config.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/utils/misc/help_config.c b/src/backend/utils/misc/help_config.c
index 0c27f96dee..1fdd134b72 100644
--- a/src/backend/utils/misc/help_config.c
+++ b/src/backend/utils/misc/help_config.c
@@ -10,7 +10,7 @@
  * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/help_config.c,v 1.19 2008/01/01 19:45:54 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/help_config.c,v 1.20 2008/02/23 19:23:33 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -117,7 +117,7 @@ printMixedStruct(mixedStruct *structToPrint)
 
 		case PGC_STRING:
 			printf("STRING\t%s\t\t\t",
-				   structToPrint->string.boot_val);
+				   structToPrint->string.boot_val ? structToPrint->string.boot_val : "");
 			break;
 
 		default: