X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fwx%2Ffilm_viewer.cc;h=89702ac0cbe519d56d4a7bb897d3d315f445b709;hb=c536ea4b470fffadcc491b2b9885e027efa2ec5c;hp=78efc77f655b97073cdd133badc66fc58fa225c3;hpb=7c730205e50014347bd96ab9735346d0b5922798;p=dcpomatic.git

diff --git a/src/wx/film_viewer.cc b/src/wx/film_viewer.cc
index 78efc77f6..89702ac0c 100644
--- a/src/wx/film_viewer.cc
+++ b/src/wx/film_viewer.cc
@@ -129,6 +129,7 @@ FilmViewer::request_idle_get ()
 	}
 
 	_idle_get = true;
+	DCPOMATIC_ASSERT (signal_manager);
 	signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 }