[gtk+] configure.ac: fix autoreconf with automake-1.13

[Javier JardÃn <jjardon src gnome org>]

commit cd67593c9fefefb3d5cf732efcb71a5c5376858f
Author: Nicola Fontana <ntd entidi it>
Date:   Mon Jan 7 15:59:59 2013 +0100

    configure.ac: fix autoreconf with automake-1.13

 configure.ac |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 14d1c26..71b4046 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,7 @@ AC_INIT([gtk+], [gtk_version],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gtk%2B],
         [gtk+])
 
-AC_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_SRCDIR([gdk/gdktypes.h])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([build-aux])
@@ -124,7 +124,6 @@ AC_SUBST([GAIL_LT_CURRENT_MINUS_AGE],[gail_lt_current_minus_age])
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_CC_C_O
-AC_PROG_CC_STDC
 AC_PROG_MKDIR_P
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET