Fix spacing of noteless clusters.

Define cluster beacon as rhythmic-grob, so spacing-engraver notices it
for shortest-starter-duration.

diff --git a/scm/define-grobs.scm b/scm/define-grobs.scm
index 02f530d54bb4288e9c2fa0387c809288153862e6..a3d1df686407f632eb15362606469e4895fca1f7 100644 (file)
--- a/scm/define-grobs.scm
+++ b/scm/define-grobs.scm
@@ -445,7 +445,8 @@
      . (
        (Y-extent . ,ly:cluster-beacon::height)
        (meta . ((class . Item)
-                (interfaces . (cluster-beacon-interface))))))
+                (interfaces . (rhythmic-grob-interface
+                               cluster-beacon-interface))))))
 
     (ClusterSpanner
      . (