restored swscale and updated opengl fx spec

ui/keyframeview.h

@@ -7,6 +7,7 @@
 struct Clip;
 class Effect;
 class EffectRow;
+class TimelineHeader;
 
 class KeyframeView : public QWidget {
 	Q_OBJECT
@@ -14,6 +15,8 @@ public:
 	KeyframeView(QWidget* parent = 0);
 	QVector<Effect*> effects;
 
+	TimelineHeader* header;
+
 	long visible_in;
 	long visible_out;
 private: