[f-spot] Fix minor typo in HACKING file

[Stephen Shaw <sshaw src gnome org>]

commit da5677e2845daaade302b2c5398c0ca504ac319e
Author: Stephen Shaw <sshaw decriptor com>
Date:   Wed Nov 16 01:11:22 2011 -0700

    Fix minor typo in HACKING file

 HACKING |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/HACKING b/HACKING
index 3d340b7..6333419 100644
--- a/HACKING
+++ b/HACKING
@@ -61,7 +61,7 @@ HACKING file.
         the word "FIXME" in the code, together with a description of the 
         problem.
 
-        Do not use XXX or TODo or obscure descriptions, because
+        Do not use XXX or TODO or obscure descriptions, because
         otherwise people will not be able to understand what you mean.