library/GSM_RR_Types: fix definition of FeatureIndicator

Change-Id: I06ad58f25aa97bf13de87127e7e2c6237a90557e
diff --git a/library/GSM_RR_Types.ttcn b/library/GSM_RR_Types.ttcn
index b09a760..0fa6ec6 100644
--- a/library/GSM_RR_Types.ttcn
+++ b/library/GSM_RR_Types.ttcn
@@ -365,10 +365,13 @@
 
 	/* 10.5.2.76 */
 	type record FeatureIndicator {
-		BIT2	spare,
-		boolean	cs_ir,
-		boolean	ps_ir
-	} with { variant "" };
+		BIT2		peo_bcch_change_mark,
+		boolean		cs_ir,
+		boolean		ps_ir
+	} with {
+		variant (cs_ir) "FIELDLENGTH(1)"
+		variant (ps_ir) "FIELDLENGTH(1)"
+	};
 
 	/* 24.008 10.5.5.6 */
 	type record DrxParameter {