[atkmm] configure.ac: Require the latest glibmm.

[Murray Cumming <murrayc src gnome org>]

commit a4d8aad062d2ad6c1a25fc1a00039de147063e68
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jun 30 14:13:55 2015 +0200

    configure.ac: Require the latest glibmm.
    
    To use the latest gmmproc, which generates nicer code for use of
    deprecated C API.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index dfee2a9..ab51225 100644
--- a/configure.ac
+++ b/configure.ac
@@ -48,7 +48,7 @@ AC_PROG_CXX
 AC_DISABLE_STATIC
 LT_INIT([win32-dll])
 
-AC_SUBST([ATKMM_MODULES], ['atk >= 1.12 glibmm-2.4 >= 2.36'])
+AC_SUBST([ATKMM_MODULES], ['atk >= 1.12 glibmm-2.4 >= 2.45.3'])
 PKG_CHECK_MODULES([ATKMM], [$ATKMM_MODULES])
 
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])