Make dialyzer happy

Author: cleverfox

src/msgpack.hrl

@@ -36,7 +36,7 @@
 -record(options_v4, {
           spec = new :: new | old,
           allow_atom = pack  :: none | pack, %% allows atom when packing
-          known_atoms = [] :: [atom()],
+          known_atoms = [] :: [atom()|binary()],
           unpack_str = as_list :: as_binary | as_list | as_tagged_list,
           validate_string = false :: boolean(),
           pack_str = from_list :: from_binary | from_list | from_tagged_list | none,

src/msgpack_unpacker.erl

@@ -237,8 +237,8 @@ unpack_str_or_raw(V, ?OPTION{spec=new,
          as_tagged_list -> {string, unpack_str(V)}
      end, Rest}.
 
-maybe_bin(Bin, ?OPTION{known_atoms=NA}) when NA=/=[] ->
-    case lists:member(Bin,NA) of
+maybe_bin(Bin, ?OPTION{known_atoms=Known}) when Known=/=[] ->
+    case lists:member(Bin,Known) of
         true ->
             erlang:binary_to_existing_atom(Bin,utf8);
         false ->