Add assert.

diff --git a/src/wx/film_viewer.cc b/src/wx/film_viewer.cc
index 78efc77f655b97073cdd133badc66fc58fa225c3..89702ac0cbe519d56d4a7bb897d3d315f445b709 100644 (file)
--- a/src/wx/film_viewer.cc
+++ b/src/wx/film_viewer.cc
@@ -129,6 +129,7 @@ FilmViewer::request_idle_get ()
        }
 
        _idle_get = true;
        }
 
        _idle_get = true;

+       DCPOMATIC_ASSERT (signal_manager);

        signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 }
 
        signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 }