censor: do not process sidedata of censored revision while bundling

The revision is censored, we should ignore it.

Differential Revision: https://phab.mercurial-scm.org/D10801

mercurial/utils/storageutil.py

@@ -481,7 +481,12 b' def emitrevisions('
         serialized_sidedata = None
         sidedata_flags = (0, 0)
         if sidedata_helpers:
+            try:
             old_sidedata = store.sidedata(rev)
+            except error.CensoredNodeError:
+                # skip any potential sidedata of the censored revision
+                sidedata = {}
+            else:
             sidedata, sidedata_flags = sidedatamod.run_sidedata_helpers(
                 store=store,
                 sidedata_helpers=sidedata_helpers,