X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2FlablGraphviz.ml;h=7a30256e3798a54d1f5266a91b225a184cb70d65;hb=1aca50505c3ce6c76dd7d20d00e358707caffd4a;hp=27835e3e90ce0c6fbae9984f7fb15577dd27d41c;hpb=59ccad1f8e0f2da227dddbcd5214ade4744fd8ba;p=helm.git

diff --git a/matita/matita/lablGraphviz.ml b/matita/matita/lablGraphviz.ml
index 27835e3e9..7a30256e3 100644
--- a/matita/matita/lablGraphviz.ml
+++ b/matita/matita/lablGraphviz.ml
@@ -74,11 +74,13 @@ class graphviz_impl ?packing () =
     method load_graph_from_file ?(gviz_cmd = "dot") fname =
       let tmp_png = tempfile () in
       let rc = Sys.command (mk_gviz_cmd gviz_cmd png_flags fname tmp_png) in
-      if rc <> 0 || (Unix.stat tmp_png).st_size = 0 then begin
+      if rc <> 0 || (Unix.stat tmp_png).Unix.st_size = 0 then begin
         eprintf
           ("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;