[Checkins] [zopefoundation/zc.relation] 1789ae: Fix variable name clash

[GitHub]

  Branch: refs/heads/py3-compat
  Home:   https://github.com/zopefoundation/zc.relation
  Commit: 1789aea2a8fba12d0e999b9ada4db3620b3809f0
      https://github.com/zopefoundation/zc.relation/commit/1789aea2a8fba12d0e999b9ada4db3620b3809f0
  Author: ale-rt <alessandro.pisa at gmail.com>
  Date:   2018-04-04 (Wed, 04 Apr 2018)

  Changed paths:
    M src/zc/relation/catalog.py
    M src/zc/relation/searchindex.py

  Log Message:
  -----------
  Fix variable name clash