share: fix unshare calling wrong repo.__init__() method

When running the unshare command, if there's other code that tries to use
the repo after the command is finished, it'll end up with a ui object for
repo.unfiltered(). This change fixes an erroneous call to repo.__init__()
that could be on the repoview proxy class--now it's always done on the
unfiltered repo.

hgext/share.py

@@ -59,7 +59,7 b' def unshare(ui, repo):'
         lock and lock.release()
 
     # update store, spath, sopener and sjoin of repo
-    repo.__init__(repo.baseui, repo.root)
+    repo.unfiltered().__init__(repo.baseui, repo.root)
 
 cmdtable = {
     "share":