[vala/staging] Fix build with -Werror=redundant-decls

[Rico Tzschichholz <ricotz src gnome org>]

commit be8658696a0e5c82f0b402373fe387c89756f23a
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Nov 12 13:18:36 2016 +0100

    Fix build with -Werror=redundant-decls

 gobject-introspection/scannerlexer.l |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/gobject-introspection/scannerlexer.l b/gobject-introspection/scannerlexer.l
index 3cfd406..f748e8c 100644
--- a/gobject-introspection/scannerlexer.l
+++ b/gobject-introspection/scannerlexer.l
@@ -44,7 +44,8 @@ char linebuf[2000];
 
 extern int yylex (GIGenerator *igenerator);
 #define YY_DECL int yylex (GIGenerator *igenerator)
-static int yywrap (void);
+#define yywrap() (1)
+#define YY_SKIP_YYWRAP
 static void parse_comment (GIGenerator *igenerator);
 static void process_linemarks (GIGenerator *igenerator, gboolean has_line);
 static int check_identifier (GIGenerator *igenerator, const char *);
@@ -225,12 +226,6 @@ stringtext                         ([^\\\"])|(\\.)
 
 %%
 
-static int
-yywrap (void)
-{
-  return 1;
-}
-
 static void parse_gtkdoc (GIGenerator *igenerator, int *c1, int *c2)
 {
   gboolean isline = FALSE;