Fix state overwrite

In very rare circumstances, the signal from the bluez comes before
the message sending function (acquire A2DP transport) returns. In
this function we ware setting transport state. However, the state
might have been already updated by the mentioned bluez signal.

src/transport.c

@@ -628,7 +628,6 @@ int transport_acquire_bt_a2dp(struct ba_transport *t) {
 	fd_list = g_dbus_message_get_unix_fd_list(rep);
 	t->bt_fd = g_unix_fd_list_get(fd_list, 0, &err);
 	t->release = transport_release_bt_a2dp;
-	t->state = TRANSPORT_PENDING;
 
 	debug("New transport: %d (MTU: R:%zu W:%zu)", t->bt_fd, t->mtu_read, t->mtu_write);