subrepo: use a safer revision check for hg repos
This avoids a traceback if the expected revision has been stripped.
--- a/mercurial/subrepo.py Thu May 12 20:27:35 2011 +0200
+++ b/mercurial/subrepo.py Thu May 12 18:35:04 2011 -0500
@@ -408,7 +408,7 @@
if r == '' and not ignoreupdate: # no state recorded
return True
w = self._repo[None]
- if w.p1() != self._repo[r] and not ignoreupdate:
+ if r != w.p1().node() and not ignoreupdate:
# different version checked out
return True
return w.dirty() # working directory changed