[libgxps] build: Fix INCLUDES for libgxps-scan.c

[Carlos Garcia Campos <carlosgc src gnome org>]

commit ee511c680406b30479f67add05b4ed1b468f9a97
Author: Michael Biebl <biebl debian org>
Date:   Sat Mar 3 22:53:21 2012 +0100

    build: Fix INCLUDES for libgxps-scan.c
    
    https://bugzilla.gnome.org/show_bug.cgi?id=671274

 docs/reference/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/Makefile.am b/docs/reference/Makefile.am
index eea37bc..5a12e33 100644
--- a/docs/reference/Makefile.am
+++ b/docs/reference/Makefile.am
@@ -80,6 +80,8 @@ expand_content_files=
 # e.g. INCLUDES=-I$(top_srcdir) -I$(top_builddir) $(GTK_DEBUG_FLAGS)
 # e.g. GTKDOC_LIBS=$(top_builddir)/gtk/$(gtktargetlib)
 INCLUDES=				\
+	-I$(top_srcdir)			\
+	-I$(top_builddir)		\
 	-I$(top_srcdir)/libgxps		\
 	-I$(top_builddir)/libgxps	\
 	$(GXPS_CFLAGS)