Cleanup: pass EqualityOptions as const&

This exposes a useless assignment of export_differing_subtitles,
which I've removed (and altered the comment accordingly).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/dcp.cc b/src/dcp.cc
index 3b267090..7c253a17 100644
--- a/src/dcp.cc
+++ b/src/dcp.cc
@@ -337,7 +337,7 @@ DCP::resolve_refs (vector<shared_ptr<Asset>> assets)
 
 
 bool
-DCP::equals (DCP const & other, EqualityOptions opt, NoteHandler note) const
+DCP::equals(DCP const & other, EqualityOptions const& opt, NoteHandler note) const
 {
 	auto a = cpls ();
 	auto b = other.cpls ();