add plugin.demo/ to the source distribution

diff --git a/Makefile.am b/Makefile.am
index b96e712c633690193ee912b8b269692c317bda94..0e66ab51db550f74109496c81c56e688962e3262 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -36,7 +36,7 @@ EXTRA_DIST = $(txt) $(html) graphviz.spec.in graphviz.spec \
        m4/README m4/iconv.m4 m4/lib-ld.m4 m4/lib-link.m4 m4/lib-prefix.m4 \
        graphviz.7 Doxyfile.in Doxyfile makearch features awk \
        config/config_perl.pl config/config_python.py \
-       config/config_ruby.rb config/config_tcl.tcl dot.demo \
+       config/config_ruby.rb config/config_tcl.tcl dot.demo  plugin.demo \
        macosx windows debian graphviz.vcproj graphviz.sln
 
 .PHONY: rpm