fix batchedUpdates return value

[ghost]

When I used ReactDOM.unstable_batchedUpdates with redux middleware to fix this issue (reduxjs/react-redux#292) it breaks redux middleware return value.

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[sophiebits]

Can you add a semicolon here?

(@zpao don't we lint for semicolons?)

[zpao]

Yes, though apparently it's only a warning so didn't fail CI (https://travis-ci.org/facebook/react/jobs/150690962#L285)

[sophiebits]

Oh, I didn't realize we had warnings.

[sophiebits]

This seems reasonable, I think. If you add the semicolon we can merge.

In the meantime, you can always work around this with something like

var x;
ReactDOM.unstable_batchedUpdates(function() {
  x = 42;
});

[sophiebits]

Thanks!