vlr_subscr: use osmo_use_count

Depends: Ife31e6798b4e728a23913179e346552a7dd338c0 (libosmocore)
Change-Id: Ib06d030e8464abe415ff597d462ed40eeddef475
diff --git a/include/osmocom/msc/db.h b/include/osmocom/msc/db.h
index 6d07055..8d9ec41 100644
--- a/include/osmocom/msc/db.h
+++ b/include/osmocom/msc/db.h
@@ -24,6 +24,8 @@
 
 #include "gsm_subscriber.h"
 
+#define VSUB_USE_SMS_RECEIVER "SMS-receiver"
+
 struct gsm_network;
 struct gsm_sms;