L1CTL_Types.ttcn: do not restrict the length of L1ctlDataInd

In the existing TC_pcu_* test cases we use L1CTL_DATA_* messages
to send / receive (E)GPRS related MAC-blocks. The length of such
blocks can be greater than 23 octets (i.e. fixed MAC-block
length in GSM), up to 162 octets to be precise.

Change-Id: Iced78796882b757016d02a266d55bc2a98b62a3d
diff --git a/library/L1CTL_Types.ttcn b/library/L1CTL_Types.ttcn
index 87849f5..f59d194 100644
--- a/library/L1CTL_Types.ttcn
+++ b/library/L1CTL_Types.ttcn
@@ -159,7 +159,7 @@
 	} with { variant "" };
 
 	type record L1ctlDataInd {
-		octetstring	payload length(23)
+		octetstring	payload
 	} with {
 		variant (payload) "BYTEORDER(first)"
 	};