fix audio-clock sample entry, handle empty entry as NOOP

diff --git a/gtk2_ardour/audio_clock.cc b/gtk2_ardour/audio_clock.cc
index 6680e95b1514cfce5113e0c1ac705064137b2066..b24d22f1b9fd2ec9e85155ddbd85424f3103f15a 100644 (file)
--- a/gtk2_ardour/audio_clock.cc
+++ b/gtk2_ardour/audio_clock.cc
@@ -620,6 +620,9 @@ AudioClock::end_edit (bool modify)
                        break;
 
                case Frames:
+                       if (edit_string.length() < 1) {
+                               edit_string = pre_edit_string;
+                       }
                        break;
                }