Applied a patch by Zoltán Böszörményi that makes ecpg's parser accept dynamic cursornames even in WHERE CURRENT OF clauses.

src/backend/parser/gram.y

@@ -9031,7 +9031,7 @@ where_clause:
 /* variant for UPDATE and DELETE */
 where_or_current_clause:
 			WHERE a_expr							{ $$ = $2; }
-			| WHERE CURRENT_P OF name
+			| WHERE CURRENT_P OF cursor_name
 				{
 					CurrentOfExpr *n = makeNode(CurrentOfExpr);
 					/* cvarno is filled in by parse analysis */