[glibmm] Improve the ChangeLog entry.

[Murray Cumming <murrayc src gnome org>]

commit 4ba9633832af94ecc1f8156c532e0305b5f7035f
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Jan 20 14:21:32 2011 +0100

    Improve the ChangeLog entry.

 ChangeLog |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 3e86d78..6400213 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,7 @@
 	* gio/src/resolver.[hg|ccg]: Use the correct OWNERSHIP_*, based on the 
 	documentation for the C functions. We must release both the list and the 
 	items.
+	Bug #639575 (Michael Edwards)
 
 2011-01-20  Murray Cumming  <murrayc murrayc com>