Fix: clonedStoredTxs can be undefined

[katspaugh]

What it solves

Resolves https://sentry.io/organizations/gnosis/issues/3096665536/?project=5436884&query=is%3Aunresolved

[github-actions]

CLA Assistant Lite All Contributors have signed the CLA.

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}

[github-actions]

Deployment links

🟠 Rinkeby	⚪ Mainnet	🟣 Polygon	🟡 BSC	⚫ Arbitrum	🟢 Gnosis Chain

[coveralls]

Pull Request Test Coverage Report for Build 1982489156

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.005%) to 34.849%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/logic/safe/store/reducer/gatewayTransactions.ts	0	1	0.0%

Totals
Change from base Build 1980904960:	-0.005%
Covered Lines:	3375
Relevant Lines:	8774

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💛 - Coveralls

[iamacook]

Sneaky 🐞