library/RSL_Types: reorder the arguments of ts_RSL_ChanMode_SIGN

This way it's consistent with ts_RSL_ChanMode, and there is
no need to pass dtx_downlink := false as the first param.

Change-Id: I0b87ef87f8cfff1c96b0beead29d549d5fe0b7c6
diff --git a/library/RSL_Types.ttcn b/library/RSL_Types.ttcn
index ff60a37..2bbbd3b 100644
--- a/library/RSL_Types.ttcn
+++ b/library/RSL_Types.ttcn
@@ -397,8 +397,8 @@
 		RSL_SpeechAlgo	coding_alg_rate
 	} with { variant (len) "LENGTHTO(reserved,dtx_d,dtx_u,spd_ind,ch_rate_type,coding_alg_rate)" }
 
-	template (value) RSL_IE_ChannelMode ts_RSL_ChanMode_SIGN(boolean dtx_downlink := false,
-								 RSL_ChanRateType t := RSL_CHRT_SDCCH) := {
+	template (value) RSL_IE_ChannelMode ts_RSL_ChanMode_SIGN(RSL_ChanRateType t := RSL_CHRT_SDCCH,
+								 boolean dtx_downlink := false) := {
 		len := 0,	/* overwritten */
 		reserved := '000000'B,
 		dtx_d := dtx_downlink,