Merge with TAH

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Merge with TAH

manifest hash: f73215065ecbcfd9a0d0964de5ed73a392837a56
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mercurial/hgweb.py

@@ -563,7 +563,7 b' class hgweb:'
                      footer = self.footer(),
                      repo = self.reponame,
                      file = file,
-                     filenode = hex(mf[file]),
+                     filenode = hex(mf.get(file, nullid)),
                      node = changeset,
                      rev = self.repo.changelog.rev(n),
                      p1 = hex(p1),