Fix test compilation error.

diff --git a/libs/ardour/ardour/tempo.h b/libs/ardour/ardour/tempo.h
index 5fce9ce384a8fe68ca78f91531b4ec9fa48623d1..1db1f65149bb6ff4aa5c4024cf706097c8f0395c 100644 (file)
--- a/libs/ardour/ardour/tempo.h
+++ b/libs/ardour/ardour/tempo.h
@@ -37,6 +37,7 @@
 
 class BBTTest;
 class FrameposPlusBeatsTest;
+class FrameposMinusBeatsTest;
 class TempoTest;
 class XMLNode;
 
@@ -501,6 +502,7 @@ private:
 
        friend class ::BBTTest;
        friend class ::FrameposPlusBeatsTest;
+       friend class ::FrameposMinusBeatsTest;
        friend class ::TempoTest;
 
        static Tempo    _default_tempo;