Fixed two parser bugs.

src/interfaces/ecpg/ChangeLog

@@ -2264,6 +2264,10 @@ Wed, 03 Oct 2007 10:48:39 +0200
 Wed, 10 Oct 2007 08:31:44 +0200
 	
 	- Synced parser and keyword list.
+
+Tue, 06 Nov 2007 09:29:22 +0100
+
+	- Fixed two parser bugs.
 	- Set pgtypes library version to 3.0.
 	- Set compat library version to 3.0.
 	- Set ecpg library version to 6.0.

src/interfaces/ecpg/preproc/preproc.y

-/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/preproc.y,v 1.354 2007/10/10 06:33:17 meskes Exp $ */
+/* $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/preproc.y,v 1.355 2007/11/06 08:32:08 meskes Exp $ */
 
 /* Copyright comment */
 %{
@@ -2024,6 +2024,10 @@ ConstraintAttributeSpec: ConstraintDeferrabilitySpec	{ $$ = $1; }
 
 			$$ = cat2_str($1, $2);
 		}
+		| /* EMPTY */
+		{
+			$$ = EMPTY;
+		}
 		;
 
 ConstraintDeferrabilitySpec: NOT DEFERRABLE
@@ -3413,7 +3417,7 @@ DeleteStmt:  DELETE_P FROM relation_expr_opt_alias using_clause where_or_current
 			{ $$ = cat_str(5, make_str("delete from"), $3, $4, $5, $6); }
 		;
 
-using_clause: USING from_list	{ cat2_str(make_str("using"), $2); }
+using_clause: USING from_list	{ $$ = cat2_str(make_str("using"), $2); }
 			| /* EMPTY */		{ $$ = EMPTY; }
 		;