[gtkmm-documentation] Fix the ChangeLog

[Murray Cumming <murrayc src gnome org>]

commit 9e8444c993f0d4bdaf0f248c43f93bd50e6e1c73
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Mar 23 20:50:38 2012 +0100

    Fix the ChangeLog

 ChangeLog |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 7cc610e..9a657d1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,7 @@
 	code calls g_set_application_name().
 	This will apparently make it appear correctly in the task list,
 	and will be used in error messages.
+
 2012-03-23  Kjell Ahlstedt <kjell ahlstedt bredband net>
 
 	Fix 'make check' with --enable-warnings=fatal.