修复bug，机器人死亡将余额设置为0

src/robot.js

@@ -260,6 +260,7 @@ async function run(param) {
             robotStatus(app)
             app.childProcess = undefined
             app.status = 0
+            app.nowBalance = 0
         });
         app.threadStatus = RobotStatus.RUNNING
         return resolve(true)