Log address on GTP creation

Change-Id: Ic54a2ff835c9a0ceccf2f718f56371a881dd25b7
diff --git a/src/gprs/sgsn_libgtp.c b/src/gprs/sgsn_libgtp.c
index 04735e2..1032230 100644
--- a/src/gprs/sgsn_libgtp.c
+++ b/src/gprs/sgsn_libgtp.c
@@ -836,6 +836,8 @@
 		LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc);
 		return rc;
 	}
+	LOGP(DGPRS, LOGL_NOTICE, "Created GTP on %s\n", inet_ntoa(sgi->cfg.gtp_listenaddr.sin_addr));
+
 	gsn = sgi->gsn;
 
 	if (gsn->mode != GTP_MODE_SGSN)