Fix creating device object on disconnect complete event

There is no need to create a new object if disconnected and the device is
not permanent/paired.
diff --git a/src/event.c b/src/event.c
index b979a8e..ba8f84a 100644
--- a/src/event.c
+++ b/src/event.c
@@ -697,7 +697,10 @@
 
 	DBG("");
 
-	if (!get_adapter_and_device(local, peer, &adapter, &device, TRUE))
+	if (!get_adapter_and_device(local, peer, &adapter, &device, FALSE))
+		return;
+
+	if (!device)
 		return;
 
 	adapter_remove_connection(adapter, device);