Merge pull request #687 from MITx/hotfix/arjun/fix_customresponse_points

fix old-style customresponses

common/lib/capa/capa/responsetypes.py

@@ -971,8 +971,9 @@ def sympy_check2():
         # build map giving "correct"ness of the answer(s)
         correct_map = CorrectMap()
         for k in range(len(idset)):
+            npoints = self.maxpoints[idset[k]] if correct[k] == 'correct' else 0
             correct_map.set(idset[k], correct[k], msg=messages[k],
-                            npoints=self.maxpoints[idset[k]])
+                            npoints=npoints)
         return correct_map
 
     def get_answers(self):