optimize: func checkPathValid returns true if the path is valid

[wangbei98]

What type of PR is this?

optimize

What this PR does / why we need it (English/Chinese):

en: change the default return
zh: 更改默认返回值

Which issue(s) this PR fixes:

[CLAassistant]

All committers have signed the CLA.

[FGYFFFF]

修改的原因是啥？

[codecov]

Codecov Report

Merging #205 (a01c1f7) into develop (f02bce2) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #205      +/-   ##
===========================================
+ Coverage    59.00%   59.01%   +0.01%     
===========================================
  Files           79       79              
  Lines         8005     8005              
===========================================
+ Hits          4723     4724       +1     
+ Misses        2933     2932       -1     
  Partials       349      349              

Impacted Files	Coverage Δ
pkg/route/tree.go	96.66% <100.00%> (ø)
pkg/common/compress/compress.go	80.95% <0.00%> (-2.86%)	⬇️
pkg/common/timer/timer.go	80.95% <0.00%> (+19.04%)	⬆️

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[wangbei98]

修改的原因是啥？

默认返回值和函数名不一致
returns “valid” (“true” for checkPathValid) by default

[welkeyever]

修改的原因是啥？

默认返回值和函数名不一致 returns “valid” (“true” for checkPathValid) by default

感谢贡献~正式merge前，辛苦签署一下cla哈

[wangbei98]

signed