Add assert.

diff --git a/src/wx/film_viewer.cc b/src/wx/film_viewer.cc
index f921f83bd7ac4285f5cd358471ca5924446a849c..17573b4388053fe1ea09539510d8632a7770cffa 100644 (file)
--- a/src/wx/film_viewer.cc
+++ b/src/wx/film_viewer.cc
@@ -286,6 +286,7 @@ FilmViewer::suspend ()
 void
 FilmViewer::resume ()
 {
+       DCPOMATIC_ASSERT (_suspended > 0);
        --_suspended;
        if (_playing && !_suspended) {
                if (_audio.isStreamOpen()) {