Make sure a dynamic_pointer_cast worked.

diff --git a/src/wx/timeline.cc b/src/wx/timeline.cc
index dbc9f4ee0648a0012c4fd987e5eddf4235612a14..9af8c3b85cb15ae4e0b11ae1fffc326d968bfcd1 100644 (file)
--- a/src/wx/timeline.cc
+++ b/src/wx/timeline.cc
@@ -321,6 +321,7 @@ place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
                }
 
                auto cv = dynamic_pointer_cast<TimelineContentView> (i);
+               DCPOMATIC_ASSERT(cv);
 
                int t = base;