[gtkmm] Marked the version in the ChangeLog

[Murray Cumming <murrayc src gnome org>]

commit cd7987987c969e92b8537b6f497224ed6ed3593a
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Jul 20 13:54:57 2009 +0200

    Marked the version in the ChangeLog

 ChangeLog |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 7ae4a2f..3ade2a5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,5 @@
+2.17.2:
+
 2009-07-13  Murray Cumming  <murrayc murrayc com>
 
 	Fixed the build.