update gpu 信息为空处理

src/main/java/com/m2pool/lease/netty/handler/ServerChannelHandler.java

@@ -97,6 +97,9 @@ public class ServerChannelHandler extends SimpleChannelInboundHandler<ClientMess
             Object params = msg.getParams();
             GpuAndSoftMessage gpuAndSoftMessage = JSONUtil.toBean(params.toString(), GpuAndSoftMessage.class);
             Map<String, GpuMessage> gpus = gpuAndSoftMessage.getGpus();
+            if(gpus == null || gpus.isEmpty()){
+                return;
+            }
             List<String> miningsofts = gpuAndSoftMessage.getMiningsofts();
             List<String> modelList = GpuBrand.trimBrand(gpus.values().stream().map(GpuMessage::getModel).collect(Collectors.toList()));
             //挖矿软件公共配置