#27708)

## **Description**

Fixes the two errors with trade and decimals being undefined that have
been causing crashes starting around the 12.1/12.2 release. I was unable
to find the root cause of this issue. Variables in the redux store seem
to return as undefined, which leads me to think it might be some sort of
redux race condition. The lowest common denominator of this error seems
to be that `getUsedQuote` selector in the `ReviewQuote` component. I
have added an additional condition to the render guard in the parent
component `prepare-swaps-page` to prevent these errors


[![Open in GitHub
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## **Related issues**


[MMS-1569](https://consensyssoftware.atlassian.net/jira/software/projects/MMS/boards/447/backlog?assignee=5ae37c7e42b8a62c4e15d92a&selectedIssue=MMS-1569)

## **Manual testing steps**

1. Open Swaps Page
2. Enter swap amount
3. Edit to token and amount rapidly multiple times 
4. Page should not crash

## **Pre-merge author checklist**

- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [x] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [x] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.


[MMS-1569]:
https://consensyssoftware.atlassian.net/browse/MMS-1569?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

…crash-hotfix

Co-authored-by: Mark Stacey <markjstacey@gmail.com>