X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2FlablGraphviz.ml;h=b0965e55e04c652e87fbbbf4498c00f3e46f0448;hb=848ec2487a5897048cce9783a53565251eb40eb8;hp=27835e3e90ce0c6fbae9984f7fb15577dd27d41c;hpb=bd81dfa48a0a2c8c6da42bd62e0357c5ed862179;p=helm.git

diff --git a/matita/matita/lablGraphviz.ml b/matita/matita/lablGraphviz.ml
index 27835e3e9..b0965e55e 100644
--- a/matita/matita/lablGraphviz.ml
+++ b/matita/matita/lablGraphviz.ml
@@ -79,6 +79,8 @@ class graphviz_impl ?packing () =
           ("Graphviz command failed (exit code: %d) on the following graph:\n"
            ^^ "%s\n%!")
           rc (HExtlib.input_file fname);
+        (* CSC: it would be better to show something explaining that the
+           graph is empty *)
         image#clear ()
       end else begin
        image#set_file tmp_png;