churn: remove redundant round()

To my surprise, the int() is required.

Spotted by Mads when he reviewed D5063. Thanks!

Differential Revision: https://phab.mercurial-scm.org/D5086

hgext/churn.py

@@ -205,7 +205,7 b' def churn(ui, repo, *pats, **opts):'
                                     '*' * charnum(sum(count)))
 
     def charnum(count):
-        return int(round(count * width // maxcount))
+        return int(count * width // maxcount)
 
     for name, count in rate:
         ui.write(format(name, count))