Fix notification for duplicate modules

Dialyzer fails when asked to analyze multiple modules with the same name, but
the error message was erroneous. With this patch Dialyzer generates a correct
error message.

Bug reported and patch submitted by Maxim Treskin.

lib/dialyzer/src/dialyzer_analysis_callgraph.erl

@@ -255,10 +255,13 @@ compile_and_store(Files, #analysis_state{codeserver = CServer,
   CServer2 = dialyzer_codeserver:set_next_core_label(NextLabel, CServer),
   case Failed =:= [] of
     true ->
-      NewFiles = lists:zip(lists:reverse(Modules), Files),
       ModDict =
-        lists:foldl(fun({Mod, F}, Dict) -> dict:append(Mod, F, Dict) end,
-                    dict:new(), NewFiles),
+        lists:foldl(fun(F, Dict) ->
+                        ModFile = lists:last(filename:split(F)),
+                        Mod = filename:basename(ModFile, ".beam"),
+                        dict:append(Mod, F, Dict)
+                    end,
+                    dict:new(), Files),
       check_for_duplicate_modules(ModDict);
     false ->
       Msg = io_lib:format("Could not scan the following file(s): ~p",