py3: catch binascii.Error raised from binascii.unhexlify

Before Python 3, binsacii.unhexlify used to raise TypeError, now it raises
binascii.Error.

mercurial/revlog.py

@@ -13,6 +13,7 b' and O(changes) merge between branches.'
 
 from __future__ import absolute_import
 
+import binascii
 import collections
 import errno
 import hashlib
@@ -1094,7 +1095,7 b' class revlog(object):'
                 if maybewdir:
                     raise error.WdirUnsupported
                 return None
-            except TypeError:
+            except (TypeError, binascii.Error):
                 pass
 
     def lookup(self, id):