[gnome-commander] Increase required gtk version to 2.24 (which is the last supported 2.x version)

[Uwe Scholz <uwescholz src gnome org>]

commit b6940001b6b03d42afe067ebe949f32585a06209
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Mon May 18 23:46:41 2020 +0200

    Increase required gtk version to 2.24 (which is the last supported 2.x version)

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index d17a95ef..7ac8b8ac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,7 +36,7 @@ dnl ===================
 
 GLIB_REQ=2.44.0
 GMODULE_REQ=2.0.0
-GTK_REQ=2.18.0
+GTK_REQ=2.24.0
 GNOME_REQ=2.0.0
 GNOMEUI_REQ=2.4.0
 GNOMEVFS_REQ=2.0.0