Fix code scanning alert-Incorrect conversion between integer types

[ghostloda]

What type of PR is this? /kind bug

What this PR does / why we need it: Fix code scanning alert-Incorrect conversion between integer types

Which issue(s) this PR fixes: Fixes #551 Fixes #550

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[wawa0210]

@ghostloda thanks your contribution :) , you need to fix the DCO

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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unittests	28.30% <ø> (+0.68%)	:arrow_up:

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see 1 file with indirect coverage changes

[ghostloda]

@ghostloda thanks your contribution :) , you need to fix the DCO

ok，fixed

[wawa0210]

good job 👍

[ghostloda]

@wawa0210 I also want to fix other scanning-Incorrect issues, but I can't see the specific error message. Can you help me?

[wawa0210]

@wawa0210 I also want to fix other scanning-Incorrect issues, but I can't see the specific error message. Can you help me?

I have attached the details in another issues.