when undoing, decr sched.reps

anki/collection.py

@@ -602,10 +602,10 @@ where c.nid == f.id
             "order by id desc limit 1", c.id)
         self.db.execute("delete from revlog where id = ?", last)
         # and finally, update daily counts
-        # fixme: what to do in cramming case?
         n = 1 if c.queue == 3 else c.queue
         type = ("new", "lrn", "rev")[n]
         self.sched._updateStats(c, type, -1)
+        self.sched.reps -= 1
         return c.id
 
     def _markOp(self, name):