Set voice_call.watch in correct way
It was set wrongly to device_watch.
diff --git a/audio/telephony-ofono.c b/audio/telephony-ofono.c
index 7c01aeb..a033701 100644
--- a/audio/telephony-ofono.c
+++ b/audio/telephony-ofono.c
@@ -850,7 +850,7 @@
vc_new = g_new0(struct voice_call, 1);
vc_new->obj_path = g_strdup(vc_obj_path);
calls = g_slist_append(calls, vc_new);
- device_watch = g_dbus_add_signal_watch(connection,
+ vc_new->watch = g_dbus_add_signal_watch(connection,
NULL, vc_obj_path,
OFONO_VC_INTERFACE,
"PropertyChanged",