hlr: Fix DTE by requesting the correct type

Previous commit d686a8a54873eb61fae7d55cb001378dae3fbd7d from Vadim
introduced a copy and paste error.

Change-Id: I5075b17a810762651e0c7d638cc4c35c58436cd9
diff --git a/hlr/HLR_EUSE.ttcn b/hlr/HLR_EUSE.ttcn
index 93eb8f4..fbb496c 100644
--- a/hlr/HLR_EUSE.ttcn
+++ b/hlr/HLR_EUSE.ttcn
@@ -58,7 +58,7 @@
 	var SS_FacilityInformation dec_fac, rsp_fac;
 	var octetstring ss_rsp;
 
-	f_gsup_find_ie(rx_pdu, OSMO_GSUP_SS_INFO_IE, state_ie);
+	f_gsup_find_ie(rx_pdu, OSMO_GSUP_SESSION_STATE_IE, state_ie);
 	var GSUP_SessionState ss_state := state_ie.session_state;
 
 	f_gsup_find_ie(rx_pdu, OSMO_GSUP_SS_INFO_IE, ss_ie);