Staging broken.

[David Kastrup]

Hi, staging does not compile anymore.

Making lily/out/keyword.o < cc
Making lily/out/simple-spacer-scheme.o < cc
Making lily/out/episema-engraver.o < cc
Making lily/out/lyric-extender.o < cc
Making lily/out/includable-lexer.o < cc
Making lily/out/timing-translator.o < cc
Making lily/out/pango-font.o < cc
Making lily/out/part-combine-part-iterator.o < cc
Making lily/out/horizontal-bracket.o < cc
/tmp/lilypond-autobuild/lily/pango-font.cc: In member function 'Stencil 
Pango_font::pango_item_string_stencil(const PangoGlyphItem*) const':
/tmp/lilypond-autobuild/lily/pango-font.cc:229:28: error: invalid use of 
incomplete type 'PangoFcFont' {aka 'struct _PangoFcFont'}
  229 |   FcPattern *fcpat = fcfont->font_pattern;
      |                            ^~
In file included from /usr/include/pango-1.0/pango/pangoft2.h:29,
                 from /tmp/lilypond-autobuild/lily/pango-font.cc:20:
/usr/include/pango-1.0/pango/pangofc-font.h:47:16: note: forward declaration of 
'PangoFcFont' {aka 'struct _PangoFcFont'}
   47 | typedef struct _PangoFcFont      PangoFcFont;
      |                ^~~~~~~~~~~~
Making lily/out/clef-engraver.o < cc
Making lily/out/key-performer.o < cc
make[1]: *** [/tmp/lilypond-autobuild/stepmake/stepmake/c++-rules.make:5: 
out/pango-font.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [/tmp/lilypond-autobuild/stepmake/stepmake/generic-targets.make:6: 
all] Error 2

I'll back out the Pango related commit and retry.  It is a bit of a
puzzler to me how this could have passed testing.

-- 
David Kastrup