Release: bump Welcome versions.

[lilypond.git] / lily / include / music.hh

diff --git a/lily/include/music.hh b/lily/include/music.hh
index c904dc3347fa457ad469aa04ad736a679a3dd835..af672a38d161915190f57cb97f15c476b9cd7184 100644 (file)
--- a/lily/include/music.hh
+++ b/lily/include/music.hh
@@ -27,7 +27,13 @@
 
 #define is_mus_type(x) internal_is_music_type (ly_symbol2scm (x))
 
-class Music : public Prob
+struct Preinit_Music {
+  SCM length_callback_;
+  SCM start_callback_;
+  Preinit_Music ();
+};
+
+class Music : Preinit_Music, public Prob
 {
 public:
   Music (SCM init);
@@ -61,8 +67,6 @@ protected:
   virtual void type_check_assignment (SCM, SCM) const;
   virtual void derived_mark () const;
 protected:
-  SCM length_callback_;
-  SCM start_callback_;
   friend SCM ly_extended_make_music (SCM, SCM);
 };