webcommands: changed code to use lazy classes when calling dagwalker

This needs to be changed to use a baseset since dagwalker now expects to
receive a smartset. This is basically wrapping revs into a baseset to be
compatible with smartset implementations.

mercurial/hgweb/webcommands.py

@@ -982,7 +982,11 b' def graph(web, req, tmpl):'
             if len(revs) >= revcount:
                 break
 
-        dag = graphmod.dagwalker(web.repo, revs)
+        # We have to feed a baseset to dagwalker as it is expecting smartset
+        # object. This does not have a big impact on hgweb performance itself
+        # since hgweb graphing code is not itself lazy yet.
+        dag = graphmod.dagwalker(web.repo, revset.baseset(revs))
+        # As we said one line above... not lazy.
         tree = list(graphmod.colored(dag, web.repo))
 
     def getcolumns(tree):