Fix locking bug in tempo map.

diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index bd6ada7714120443dd55c8258317b59eead0eac7..6379472b2dc7bde3dc56e7cdabfe856603d93ca6 100644 (file)
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -3167,7 +3167,7 @@ TempoMap::exact_qn_at_frame_locked (const Metrics& metrics, const framepos_t& fr
                qn = floor (qn) + (floor (((qn - floor (qn)) * (double) sub_num) + 0.5) / sub_num);
        } else if (sub_num == 1) {
                /* the gui requested exact musical (BBT) beat */
-               qn = quarter_note_at_beat (floor (beat_at_frame_locked (metrics, frame) + 0.5));
+               qn = quarter_note_at_beat_locked (metrics, floor (beat_at_frame_locked (metrics, frame) + 0.5));
        } else if (sub_num == -1) {
                /* snap to  bar */
                Timecode::BBT_Time bbt = bbt_at_pulse_locked (metrics, qn / 4.0);