mtp3_codec: update eunit test with recent code change

Fixes in the mtp3 parser introduced in
092443629b7de87f4cd2d0fc0de13da3e5a50203 have to be reflected in the
test case.
diff --git a/test/mtp3_codec_tests.erl b/test/mtp3_codec_tests.erl
index 86e944c..6715e53 100644
--- a/test/mtp3_codec_tests.erl
+++ b/test/mtp3_codec_tests.erl
@@ -6,7 +6,7 @@
 -include("mtp3.hrl").
 
 -define(MTP3_MSG_BIN, <<131,92,64,0,192,9,0,3,13,24,10,18,7,0,18,4,83,132,9,0,23,11,18,6,0,18,4,68,119,88,16,70,35,67,100,65,73,4,81,1,2,200,107,42,40,40,6,7,0,17,134,5,1,1,1,160,29,97,27,128,2,7,128,161,9,6,7,4,0,0,1,0,1,3,162,3,2,1,0,163,5,161,3,2,1,0,108,13,163,11,2,1,64,2,1,8,48,3,10,1,0>>).
--define(MTP3_MSG_DEC, {mtp3_msg,2,3,{mtp3_routing_label,5,12544,192},undefined,<<9,0,3,13,24,10,18,7,0,18,4,83,132,9,0,23,11,18,6,0,18,4,68,119,88,16,70,35,67,100,65,73,4,81,1,2,200,107,42,40,40,6,7,0,17,134,5,1,1,1,160,29,97,27,128,2,7,128,161,9,6,7,4,0,0,1,0,1,3,162,3,2,1,0,163,5,161,3,2,1,0,108,13,163,11,2,1,64,2,1,8,48,3,10,1,0>>}).
+-define(MTP3_MSG_DEC, {mtp3_msg,2,3,{mtp3_routing_label,12,92,1},undefined,<<9,0,3,13,24,10,18,7,0,18,4,83,132,9,0,23,11,18,6,0,18,4,68,119,88,16,70,35,67,100,65,73,4,81,1,2,200,107,42,40,40,6,7,0,17,134,5,1,1,1,160,29,97,27,128,2,7,128,161,9,6,7,4,0,0,1,0,1,3,162,3,2,1,0,163,5,161,3,2,1,0,108,13,163,11,2,1,64,2,1,8,48,3,10,1,0>>}).
 
 parse_test() ->
 	?assertEqual(?MTP3_MSG_DEC, mtp3_codec:parse_mtp3_msg(?MTP3_MSG_BIN)).