hgweb: wrap {entries}* of changelog with mappinglist

They were lists of mappings.

mercurial/hgweb/webcommands.py

@@ -441,9 +441,9 b' def changelog(web, shortlog=False):'
         rev=pos,
         symrev=symrev,
         changesets=count,
-        entries=entries,
-        latestentry=latestentry,
-        nextentry=nextentry,
+        entries=templateutil.mappinglist(entries),
+        latestentry=templateutil.mappinglist(latestentry),
+        nextentry=templateutil.mappinglist(nextentry),
         archives=web.archivelist('tip'),
         revcount=revcount,
         morevars=morevars,