Piano: Avoid selecting out of range notes.

Fixes #5736. The selected note value could also underflow if
you drag to the left, but the assert got triggered only in
case you're dragging past the end of the note roll.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/Applications/Piano/RollWidget.cpp b/Userland/Applications/Piano/RollWidget.cpp
index 2677fed384..cc63e7ee92 100644
--- a/Userland/Applications/Piano/RollWidget.cpp
+++ b/Userland/Applications/Piano/RollWidget.cpp
@@ -191,7 +191,7 @@ void RollWidget::mousemove_event(GUI::MouseEvent& event)
         if (note_width_is_fractional && x_is_not_last)
             ++x;
         x /= m_note_width;
-        return x;
+        return clamp(x, 0, m_num_notes - 1);
     };
 
     int x0 = get_note_x(m_note_drag_start.value().x());