Cosmetic PL/PgSQL fix: declare the second parameter plpgsql_dstring_append

as a const char *, so that we don't need to cast away a const in gram.y

src/pl/plpgsql/src/gram.y

@@ -4,7 +4,7 @@
  *						  procedural language
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/gram.y,v 1.61 2004/08/20 22:00:14 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/gram.y,v 1.62 2004/09/14 23:46:46 neilc Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -1709,7 +1709,7 @@ read_sql_construct(int until,
 
 	lno = plpgsql_scanner_lineno();
 	plpgsql_dstring_init(&ds);
-	plpgsql_dstring_append(&ds, (char *) sqlstart);
+	plpgsql_dstring_append(&ds, sqlstart);
 
 	for (;;)
 	{

src/pl/plpgsql/src/pl_funcs.c

@@ -3,7 +3,7 @@
  *			  procedural language
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_funcs.c,v 1.36 2004/08/30 02:54:42 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_funcs.c,v 1.37 2004/09/14 23:46:46 neilc Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -80,7 +80,7 @@ plpgsql_dstring_free(PLpgSQL_dstring *ds)
  * ----------
  */
 void
-plpgsql_dstring_append(PLpgSQL_dstring *ds, char *str)
+plpgsql_dstring_append(PLpgSQL_dstring *ds, const char *str)
 {
 	int			len = strlen(str);
 	int			needed = ds->used + len + 1;

src/pl/plpgsql/src/plpgsql.h

@@ -3,7 +3,7 @@
  *			  procedural language
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/plpgsql.h,v 1.54 2004/09/13 20:09:21 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/plpgsql.h,v 1.55 2004/09/14 23:46:46 neilc Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -716,7 +716,7 @@ extern void plpgsql_xact_cb(XactEvent event, TransactionId parentXid, void *arg)
  */
 extern void plpgsql_dstring_init(PLpgSQL_dstring *ds);
 extern void plpgsql_dstring_free(PLpgSQL_dstring *ds);
-extern void plpgsql_dstring_append(PLpgSQL_dstring *ds, char *str);
+extern void plpgsql_dstring_append(PLpgSQL_dstring *ds, const char *str);
 extern char *plpgsql_dstring_get(PLpgSQL_dstring *ds);
 
 /* ----------