[gparted] modern-gtk2: Require Gtkmm version 2.24 (!17)

[Mike Fleetwood <mfleetwo src gnome org>]

commit 8b42bab1eea572a2a43e99e3d86fe93920675599
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Sun Aug 26 20:06:54 2018 +0200

    modern-gtk2: Require Gtkmm version 2.24 (!17)
    
    Require the latest minor version of gtkmm2, released back in 2011 [1].
    This is the first step in porting to Gtk3 [2].  This drops GParted
    support for very old but still supported distributions:
        Distribution      EOL        Gtkmm
        RHEL / CentOS 6   2020-Nov   2.18.2
        SLES 11           2022-Mar   2.14.1
    
    References:
    [1] ANNOUNCE: gtkmm 2.24.0
        https://mail.gnome.org/archives/gtkmm-list/2011-February/msg00038.html
    [2] Migrating from GTK+ 2.x to GTK+ 3 / Preparation in GTK+ 2.x
        https://developer.gnome.org/gtk3/stable/gtk-migrating-2-to-3.html#id-1.6.3.3
    
    Closes !17 - Gtk2 modernisation

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 15b0792e..501fdd07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -219,7 +219,7 @@ AC_SUBST([GTHREAD_LIBS])
 AC_SUBST([GTHREAD_CFLAGS])
 
 dnl GTKMM
-PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.16.0])
+PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.24.0])
 AC_SUBST([GTKMM_LIBS])
 AC_SUBST([GTKMM_CFLAGS])