rebase: take locks in the right order

repo.lock was taken before repo.wlock - that could in principle cause a deadlock.

hgext/rebase.py

@@ -115,8 +115,8 b' def rebase(ui, repo, **opts):'
 
     lock = wlock = None
     try:
+        wlock = repo.wlock()
         lock = repo.lock()
-        wlock = repo.wlock()
 
         # Validate input and define rebasing points
         destf = opts.get('dest', None)