Fix/compare error object

[bluebill1049]

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[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 4a11c75:

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blue-dew-ep6cv	Configuration

[github-actions]

Size Change: +163 B (0%)

Total Size: 94.3 kB

Filename	Size	Change
dist/react-hook-form.es.js	14.3 kB	+31 B (0%)
dist/react-hook-form.ie11.js	42.4 kB	+52 B (0%)
dist/react-hook-form.js	14.3 kB	+31 B (0%)
dist/react-hook-form.min.es.js	8.6 kB	+17 B (0%)
dist/react-hook-form.umd.js	14.6 kB	+32 B (0%)

_{compressed-size-action}