fix crash scrolling slightly beyond bottom note

stakira · stakira · commit 8c92eb322192 · 2023-06-18T20:31:55.000-07:00
diff --git a/OpenUtau/Controls/TrackBackground.cs b/OpenUtau/Controls/TrackBackground.cs
@@ -101,6 +101,9 @@ private bool IsAltTrack(int track) {
                 return track % 2 == 1;
             }
             int tone = ViewConstants.MaxTone - 1 - track;
+            if (tone < 0) {
+                return false;
+            }
             return MusicMath.IsBlackKey(tone);
         }
 

Original file line number	Diff line number	Diff line change
`@@ -101,6 +101,9 @@ private bool IsAltTrack(int track) {`
`101`	`101`	`return track % 2 == 1;`
`102`	`102`	`}`
`103`	`103`	`int tone = ViewConstants.MaxTone - 1 - track;`
	`104`	`+ if (tone < 0) {`
	`105`	`+ return false;`
	`106`	`+ }`
`104`	`107`	`return MusicMath.IsBlackKey(tone);`
`105`	`108`	`}`
`106`	`109`