From: Paul Molodowitch <pm@stanfordalumni.org>

bookmark: hglib.invalidaterepo resets repo._bookmarkcurrent

This makes the current bookmark be refreshed correctly in a few situation
where it still wasn't (ie, if a change is made from the command line, while
a tortoiseHg window is open).

diff -r 6cd92f95a0af tortoisehg/util/hglib.py
--- a/tortoisehg/util/hglib.py	Wed Dec 16 22:32:18 2009 -0600
+++ b/tortoisehg/util/hglib.py	Thu Dec 17 11:41:34 2009 -0800
@@ -120,6 +120,8 @@
     repo.invalidate()
     if '_bookmarks' in repo.__dict__:
         repo._bookmarks = {}
+    if hasattr(repo, '_bookmarkcurrent'):
+        repo._bookmarkcurrent = None
     if 'mq' in repo.__dict__: #do not create if it does not exist
         repo.mq.invalidate()