Return 0 as 'hg bisect reset' is successful

hgext/hbisect.py

@@ -81,7 +81,7 b' class bisect(object):'
         # Not sure about this
         #self.ui.write("Going back to tip\n")
         #self.repo.update(self.repo.changelog.tip())
-        return 1
+        return 0
 
     def num_ancestors(self, head=None, stop=None):
         """