input_common: udp: Avoid crash when trying to map motion before client is ready

src/input_common/drivers/udp_client.cpp

@@ -338,6 +338,7 @@ void UDPClient::StartCommunication(std::size_t client, const std::string& host,
     for (std::size_t index = 0; index < PADS_PER_CLIENT; ++index) {
         const PadIdentifier identifier = GetPadIdentifier(client * PADS_PER_CLIENT + index);
         PreSetController(identifier);
+        PreSetMotion(identifier, 0);
     }
 }