Re-sync MozsearchIndexer.cpp from mozilla-central after change in bug 1501129
Re-sync MozsearchIndexer.cpp from mozilla-central after change in bug 1501129

bill-mccloskey/searchfox,bill-mccloskey/searchfox,bill-mccloskey/searchfox,bill-mccloskey/searchfox,bill-mccloskey/searchfox,bill-mccloskey/searchfox