msc_vty: also show IMEI and IMEISV

When the VLR subscriber information is shown on the VTY it shows IMSI
and TMSI, but not IMEI and IMEISV. Since in some cases this information
might be helpful, lets display it as well.

Change-Id: Iedd75dbb9850388ec1fedb984ed0b8bf4c62e780
diff --git a/src/libmsc/msc_vty.c b/src/libmsc/msc_vty.c
index 3079bc3..c5d2832 100644
--- a/src/libmsc/msc_vty.c
+++ b/src/libmsc/msc_vty.c
@@ -641,6 +641,10 @@
 	if (vsub->tmsi_new != GSM_RESERVED_TMSI)
 		vty_out(vty, "    new TMSI: %08X%s", vsub->tmsi_new,
 			VTY_NEWLINE);
+	if (vsub->imei[0] != '\0')
+		vty_out(vty, "    IMEI: %s%s", vsub->imei, VTY_NEWLINE);
+	if (vsub->imeisv[0] != '\0')
+		vty_out(vty, "    IMEISV: %s%s", vsub->imeisv, VTY_NEWLINE);
 
 	vty_out(vty, "    Flags: %s", VTY_NEWLINE);
 	vty_out(vty, "     IMSI detached:             %s%s",