fix round(5) crash, check type error

[leaout]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

return round(5) crash

How do you solve it?

add type check

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:

ex. Fixed the bug .....

[CLAassistant]

All committers have signed the CLA.

[Salieri-004]

Thanks for your contribution!

[Salieri-004]

@leaout Please sign Contributor License Agreement

[leaout]

@leaout Please sign Contributor License Agreement

License is ok

[Salieri-004]

@leaout Could you check this page?

[leaout]

@leaout Could you check this page?

User name And email address had error， first commit message was not to be modified，what should I do？

[Salieri-004]

@leaout Could you check this page?

User name And email address had error， first commit message was not to be modified，what should I do？

Could you roll back and recommit it?