Make sure the private headers end up in the tarball on make dist
diff --git a/cpp/Makefile.am b/cpp/Makefile.am
index 2e3f56d..f19428e 100644
--- a/cpp/Makefile.am
+++ b/cpp/Makefile.am
@@ -20,14 +20,19 @@
lib_LTLIBRARIES = libpoppler-cpp.la
libpoppler_cpp_la_SOURCES = \
poppler-document.cpp \
+ poppler-document-private.h \
poppler-embedded-file.cpp \
+ poppler-embedded-file-private.h \
poppler-font.cpp \
poppler-global.cpp \
poppler-page.cpp \
+ poppler-page-private.h \
poppler-page-transition.cpp \
poppler-private.cpp \
+ poppler-private.h \
poppler-rectangle.cpp \
poppler-toc.cpp \
+ poppler-toc-private.h \
poppler-version.cpp
libpoppler_cpp_la_LIBADD = \