Typo fix for issue 4486: ly:music -> ly:music?

diff --git a/scm/ly-syntax-constructors.scm b/scm/ly-syntax-constructors.scm
index f93ed3ff8cf052b2255eae09c35afb7e9081d6d0..cd200fa2c28f41301e66fedbd0525de62ee1bab5 100644 (file)
--- a/scm/ly-syntax-constructors.scm
+++ b/scm/ly-syntax-constructors.scm
@@ -50,7 +50,7 @@
             (if (ly:music? m) (ly:set-origin! m) m)
             (music-function-call-error fun m))
         (and (pair? sigcar)
-             (if (ly:music (cdr sigcar))
+             (if (ly:music? (cdr sigcar))
                  (ly:music-deep-copy (cdr sigcar) (*location*))
                  (cdr sigcar))))))