actually request the IMEI not IMEISV, since Phase 1 doesn't have IMEISV

diff --git a/src/gsm_04_08.c b/src/gsm_04_08.c
index 936d72f..d5a5bee 100644
--- a/src/gsm_04_08.c
+++ b/src/gsm_04_08.c
@@ -553,7 +553,7 @@
 	case GSM_MI_TYPE_IMSI:
 		/* we always want the IMEI, too */
 		use_lchan(lchan);
-		rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMEISV);
+		rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMEI);
 		lchan->loc_operation->waiting_for_imei = 1;
 
 		/* look up subscriber based on IMSI */
@@ -562,7 +562,7 @@
 	case GSM_MI_TYPE_TMSI:
 		/* we always want the IMEI, too */
 		use_lchan(lchan);
-		rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMEISV);
+		rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMEI);
 		lchan->loc_operation->waiting_for_imei = 1;
 
 		/* look up the subscriber based on TMSI, request IMSI if it fails */