Merge pull request #1279 from gbour/fix-dialyzer

fix catching  `not_valid` error on dialyzer

src/rebar_prv_dialyzer.erl

@@ -260,6 +260,8 @@ read_plt(_State, Plt) ->
             Result;
         {error, no_such_file} ->
             error;
+        {error, not_valid} ->
+            error;
         {error, read_error} ->
             Error = io_lib:format("Could not read the PLT file ~p", [Plt]),
             throw({dialyzer_error, Error})