变量is_virtual_ 判断存在bug

[zhaofuxie]

Describe the bug A clear and concise description of what the bug is. string 类型变量与 int 类型变量之间无法按设计需求进行逻辑比较 To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen. isvirtual = (std::stoi(perception_obstacle.id()) < 0);

Screenshots If applicable, add screenshots to help explain your problem. modules/planning/common/obstacle.cc

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[zhaofuxie]

I make mistake,