Avoid trying to print a NULL char pointer in --describe-config. On some

tglsfdc · tglsfdc · commit babbd1219e0e · 2008-02-23T19:23:37.000Z
platforms this works, but on some it crashes.  Zdenek Kotala
diff --git 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 1.19.2.1 2008/02/23 19:23:37 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:
