Revert pg_bind_textdomain_codeset to a existant-but-empty function when

ENABLE_NLS is not defined, for better compatibility of the backend with
modules compiled the other way.

Per note from Tom after my previous commit.

src/backend/utils/mb/mbutils.c

@@ -4,7 +4,7 @@
  * (currently mule internal code (mic) is used)
  * Tatsuo Ishii
  *
- * $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.81 2009/03/08 18:10:16 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.82 2009/03/09 00:01:32 alvherre Exp $
  */
 #include "postgres.h"
 
@@ -900,11 +900,10 @@ SetDatabaseEncoding(int encoding)
  * On Windows, we need to explicitly bind gettext to the correct
  * encoding, because gettext() tends to get confused.
  */
-#ifdef ENABLE_NLS
 void
 pg_bind_textdomain_codeset(const char *domainname, int encoding)
 {
-#ifdef WIN32
+#if defined(ENABLE_NLS) && defined(WIN32)
 	int     i;
 
 	for (i = 0; i < lengthof(codeset_map_array); i++)
@@ -919,7 +918,6 @@ pg_bind_textdomain_codeset(const char *domainname, int encoding)
 	}
 #endif
 }
-#endif
 
 void
 SetDefaultClientEncoding(void)

src/include/mb/pg_wchar.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/mb/pg_wchar.h,v 1.86 2009/03/08 18:10:17 alvherre Exp $
+ * $PostgreSQL: pgsql/src/include/mb/pg_wchar.h,v 1.87 2009/03/09 00:01:32 alvherre Exp $
  *
  *	NOTES
  *		This is used both by the backend and by libpq, but should not be
@@ -392,9 +392,7 @@ extern const char *pg_get_client_encoding_name(void);
 extern void SetDatabaseEncoding(int encoding);
 extern int	GetDatabaseEncoding(void);
 extern const char *GetDatabaseEncodingName(void);
-#ifdef ENABLE_NLS
 extern void pg_bind_textdomain_codeset(const char *domainname, int encoding);
-#endif
 
 extern int	pg_valid_client_encoding(const char *name);
 extern int	pg_valid_server_encoding(const char *name);