Add %option noinput to contrib's flex scanners, to suppress gcc 4.3

warnings.  Peter did this for core awhile ago but evidently missed
contrib.

contrib/cube/cubescan.l

 %{
 /* 
 ** A scanner for EMP-style numeric ranges 
- * $PostgreSQL: pgsql/contrib/cube/cubescan.l,v 1.11 2006/03/11 04:38:28 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/cube/cubescan.l,v 1.12 2008/08/25 23:12:45 tgl Exp $
 */
 
 #include "postgres.h"
@@ -29,6 +29,7 @@ void cube_scanner_finish(void);
 %option 8bit
 %option never-interactive
 %option nodefault
+%option noinput
 %option nounput
 %option noyywrap
 %option prefix="cube_yy"

contrib/seg/segscan.l

@@ -27,6 +27,7 @@ void seg_scanner_finish(void);
 %option 8bit
 %option never-interactive
 %option nodefault
+%option noinput
 %option nounput
 %option noyywrap
 %option prefix="seg_yy"