Add more warnings

[melted] / mlt++ / src / MltProducer.h

diff --git a/mlt++/src/MltProducer.h b/mlt++/src/MltProducer.h
index 09a4977..cf43173 100644 (file)
--- a/mlt++/src/MltProducer.h
+++ b/mlt++/src/MltProducer.h
@@ -32,6 +32,7 @@ namespace Mlt
        class Service;
        class Filter;
        class Profile;
+       class Frame;
 
        class MLTPP_DECLSPEC Producer : public Service
        {