Make sure we have a subtitle if we're trying to reference it.

diff --git a/src/lib/player.cc b/src/lib/player.cc
index 3ae95cf5275d2ea0f5393c6d7d9abc40909e9501..10e47686283d7df200c15e7ff88193909305fc06 100644 (file)
--- a/src/lib/player.cc
+++ b/src/lib/player.cc
@@ -783,6 +783,7 @@ Player::get_reel_assets ()
                        }
 
                        if (j->reference_subtitle ()) {
+                               DCPOMATIC_ASSERT (k->main_subtitle ());
                                a.push_back (
                                        ReferencedReelAsset (
                                                k->main_subtitle (),