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

[Murray Cumming <murrayc src gnome org>]

commit c446d04207694d92d1a4c4372211b056ee9c4a01
Author: Murray Cumming <murrayc murrayc com>
Date:   Sat Aug 22 14:06:30 2015 +0200

    configure.ac: Require the latest glibmm.
    
    To use the latest gmmproc, which generates more move operations,
    and to have the latest Glib::Object/ObjectBase/Interface which have
    move operations that those generated move operations call.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8db5aab..3c0fcf6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,7 +93,7 @@ AS_IF([test "x$enable_static" = xyes],
 # gdkmm really does need GTK+, because part of Gdk::DragContext is in GTK+.
 # The extra cairomm-1.0 check is because gdkmm requires a newer cairomm than pangomm requires.
 # The extra gdk-pixbuf-2.0 check is because gdkmm requires a newer gdk-pixbuf than gtk+-3.0 requires.
-AC_SUBST([GDKMM_MODULES], ['giomm-2.4 >= 2.45.50 pangomm-1.4 >= 2.37.1 gtk+-3.0 >= 3.17.7 cairomm-1.0 >= 
1.9.2 gdk-pixbuf-2.0 >= 2.26.0'])
+AC_SUBST([GDKMM_MODULES], ['giomm-2.4 >= 2.45.52 pangomm-1.4 >= 2.37.1 gtk+-3.0 >= 3.17.7 cairomm-1.0 >= 
1.9.2 gdk-pixbuf-2.0 >= 2.26.0'])
 
 AS_IF([test "x$gtkmm_host_windows" = xyes],
       [GTKMM_MODULES=$GDKMM_MODULES],