Fix Issue #285

Fix case of msg is successfully "bdecoded", but it is not lazy_entry dictionary actually.

src/twister.cpp

@@ -1090,7 +1090,8 @@ bool processReceivedDM(lazy_entry const* post)
                         lazy_entry v;
                         int pos;
                         libtorrent::error_code ec;
-                        if (lazy_bdecode(textOut.data(), textOut.data()+textOut.size(), v, ec, &pos) == 0) {
+                        if (lazy_bdecode(textOut.data(), textOut.data()+textOut.size(), v, ec, &pos) == 0
+                                && v.type() == lazy_entry::dict_t) {
                             msg = v.dict_find_string_value("msg");
                             to = v.dict_find_string_value("to");
                             // new features here: key distribution etc