engraver-init.ly: guarantee no ledger lines in NullVoice (issue 297730043 by address@hidden)

[paulwmorris]

Reviewers: ,

Message:
Please review.  See issue 4818 for examples that show this obscure edge
case.  Luckily it was an easy fix once I figured out what was going on.
Thanks, -Paul

Description:
engraver-init.ly: guarantee no ledger lines in NullVoice

for staves with custom line positions and ledger
lines that appear inside the staff.

Please review this at https://codereview.appspot.com/297730043/

Affected files (+4, -0 lines):
  M ly/engraver-init.ly


Index: ly/engraver-init.ly
diff --git a/ly/engraver-init.ly b/ly/engraver-init.ly
index  
4d35598887d5c39db36d29f05e14aa718050e415..6421d9efa1f3fa2aa990743062a3dbb1a5c13521  
100644
--- a/ly/engraver-init.ly
+++ b/ly/engraver-init.ly
@@ -828,6 +828,10 @@ context."
   \consists "Pitch_squash_engraver"
   squashedPosition = 0

+  %% generate no ledger lines, needed for staves with custom
+  %% line positions and ledger lines that appear inside the staff
+  \override NoteHead.no-ledgers = ##t
+
   %% the engravers that control the 'busy' flags for note-onsets and  
melismata
   \consists "Grob_pq_engraver"
   \consists "Tie_engraver"