Clean up longstanding gcc warnings by adding missing extern

declarations.

src/backend/parser/scan.l

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.60 1999/10/18 02:42:31 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.61 2000/01/20 05:26:53 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -356,7 +356,7 @@ other			.
 
 %%
 
-void yyerror(char message[])
+void yyerror(const char * message)
 {
 	elog(ERROR, "parser: %s at or near \"%s\"", message, yytext);
 }

src/include/parser/gramparse.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: gramparse.h,v 1.9 1999/02/13 23:21:55 momjian Exp $
+ * $Id: gramparse.h,v 1.10 2000/01/20 05:26:54 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -16,6 +16,8 @@
 
 /* from scan.l */
 extern void init_io(void);
+extern int	yylex(void);
+extern void yyerror(const char * message);
 
 /* from gram.y */
 extern Oid	param_type(int t);