sccp_codec: SCCP point codes are little-endian !

we parsed and generated them as big-endian so far, which is wrong.
diff --git a/src/sccp_codec.erl b/src/sccp_codec.erl
index 25ad05b..137812b 100644
--- a/src/sccp_codec.erl
+++ b/src/sccp_codec.erl
@@ -32,7 +32,7 @@
 parse_point_code(BinPC, PCind) when is_binary(BinPC) ->
 	case PCind of
 		1 ->
-			<<PointCode:16/big, Remain/binary>> = BinPC;
+			<<PointCode:16/little, Remain/binary>> = BinPC;
 		_ ->
 			Remain = BinPC,
 			PointCode = undef
@@ -272,7 +272,7 @@
 		undef ->
 			{0, <<>>};
 		_ ->
-			{1, <<PointCode:16/big>>}
+			{1, <<PointCode:16/little>>}
 	end.
 
 encode_ssn(SSN) ->