fix default reference voice and chords for songbook output

all_base_includes.ly

@@ -17,4 +17,8 @@
 LAYOUT = \layout { \generalLayout }
 HEADER = {}
 MUSIC = {}
-TEXT = \markuplist {""}
+TEXT = \markuplist {""}
+
+verseChords = {}
+firstVoice = {}
+global = {}

standalone_output.ly

@@ -10,7 +10,12 @@ verselayout = \layout {
     \override ChordName.font-size = \songTextChordFontSize
   }
 }
-TEXT = \markuplist { \override #`(verselayout . verselayout) \TEXT }
+TEXT = \markuplist {
+  \override #`(verselayout . verselayout)
+  \override #`(verse-chords . ,#{ \chords { \verseChords } #})
+  \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
+  \TEXT
+}
 
 % nur Output wenn noStandaloneOutput auf false steht
 output = #(if (not noStandaloneOutput)

verses_with_chords.ly

@@ -222,9 +222,9 @@
         (interpret-markup-list layout props lines))))
 
 #(define-markup-command (chordlyrics layout props lyrics) (ly:music?)
-   #:properties ((verse-chords #f)
-                 (verse-reference-voice #f)
-                 (verse-break-voice #f)
+   #:properties ((verse-chords #{#})
+                 (verse-reference-voice #{#})
+                 (verse-break-voice #{#})
                  (verse-line-height songTextLineHeigth)
                  (intraverse-vspace 0))
   "Vers mit Akkorden"
@@ -236,9 +236,9 @@
         \score-equal-height #verse-line-height \score-lines {
           \transposable
           <<
-            \new Devnull { #(if (ly:music? verse-break-voice) verse-break-voice) }
-            #(if (ly:music? verse-chords) (music-clone verse-chords) #{ \chords { \verseChords } #})
-            \new NullVoice { #(if (ly:music? verse-reference-voice) verse-reference-voice #{ \global \firstVoice #}) }
+            \new Devnull { #verse-break-voice }
+            #(music-clone verse-chords)
+            \new NullVoice { #verse-reference-voice }
             \addlyrics { #lyrics }
           >>
           \layout {