[PATCH 4 of 5 V3] commands.bookmarks: move cur initialization to inside wlock

[Siddharth Agarwal]

# HG changeset patch
# User Siddharth Agarwal <sid0 at fb.com>
# Date 1384893737 28800
#      Tue Nov 19 12:42:17 2013 -0800
# Node ID e04bd1e754d2910a9b3b6051fd5f229f1c4d78d7
# Parent  86fa1866bd2bcdcf24c9ec1815a7f27d13d6b9cf
commands.bookmarks: move cur initialization to inside wlock

This is more correct because we now fetch '.' while nothing else can interfere
with it.

diff -r 86fa1866bd2bcdcf24c9ec1815a7f27d13d6b9cf -r e04bd1e754d2910a9b3b6051fd5f229f1c4d78d7 mercurial/commands.py
--- a/mercurial/commands.py	Thu Nov 21 17:11:04 2013 -0800
+++ b/mercurial/commands.py	Tue Nov 19 12:42:17 2013 -0800
@@ -808,7 +808,6 @@ def bookmark(ui, repo, *names, **opts):
     inactive = opts.get('inactive')
 
     hexfn = ui.debugflag and hex or short
-    cur   = repo.changectx('.').node()
 
     def checkformat(mark):
         mark = mark.strip()
@@ -864,6 +863,7 @@ def bookmark(ui, repo, *names, **opts):
     if delete or rename or names or inactive:
         wlock = repo.wlock()
         try:
+            cur = repo.changectx('.').node()
             marks = repo._bookmarks
             if delete:
                 for mark in names: