library/GSM_RR_Types: make ts_SacchL1Header easier to use

Move parameter 'fpc' at the end and assign false by default, so that
there is not need to pass false.  We never set it to true anyway.

Change-Id: I8a0ef562c2426a637fbb9fe3d50711ee7738d04f
diff --git a/library/LAPDm_RAW_PT.ttcn b/library/LAPDm_RAW_PT.ttcn
index 3e2fba2..946da67 100644
--- a/library/LAPDm_RAW_PT.ttcn
+++ b/library/LAPDm_RAW_PT.ttcn
@@ -494,7 +494,7 @@
 					link_id := valueof(ts_RslLinkID_SACCH(lpd.sapi));
 					buf := f_pad_oct(enc_LapdmFrame(lpd.lapdm), 21, '2B'O);
 					var SacchL1Header l1h := valueof(ts_SacchL1Header(ms_power_lvl,
-										false, timing_adv));
+											  timing_adv));
 					L1CTL.send(ts_L1CTL_DATA_REQ_SACCH(chan_desc.chan_nr, link_id,
 									   l1h, buf));
 				} else {