Fix fret-diagrams.scm to eliminate slight white line below thick zero fret

diff --git a/scm/fret-diagrams.scm b/scm/fret-diagrams.scm
index 80bf4fc22a7c4e4d3df97f32aabb7cfa4f9add7e..6537ece10c07d192dede7892980e65a902f7e934 100644 (file)
--- a/scm/fret-diagrams.scm
+++ b/scm/fret-diagrams.scm
@@ -147,7 +147,7 @@ fret & string spacing by @var{size}. Orientation is given by @var{orientation}"
          (y1 (- half-thick))
          (y2 (+ top-fret-thick half-thick))
          (x-extent (cons (- x1) x2))
-         (y-extent (cons 0 y2)))
+         (y-extent (cons sth top-fret-thick)))
     (if (eq? orientation 'normal)
         (ly:make-stencil (list 'round-filled-box x1 x2 y1 y2 sth)
                          x-extent y-extent)