Remove a confusing pair of parentheses.

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 1.52 2005/10/15 02:49:33 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.53 2006/01/11 06:59:22 neilc Exp $
  */
 #include "postgres.h"
 
@@ -80,8 +80,8 @@ SetClientEncoding(int encoding, bool doit)
 	 * Check for cases that require no conversion function.
 	 */
 	if (current_server_encoding == encoding ||
-		(current_server_encoding == PG_SQL_ASCII ||
+		current_server_encoding == PG_SQL_ASCII ||
-		 encoding == PG_SQL_ASCII))
+		encoding == PG_SQL_ASCII)
 	{
 		if (doit)
 		{