Spring-ai fix:resolve NPE error when using OpenAI embedding model

Resolves issue: #1152

Comment From: ThomasVitale

Thanks for the PR! I have also raised this bug in https://github.com/spring-projects/spring-ai/issues/1152 and opened this PR yesterday https://github.com/spring-projects/spring-ai/pull/1153

Comment From: tzolov

Thank you for catching this @hambuger I believe the 9a8a133d9388e020109bb4f108ac22520760e00f commit resolves it?

Comment From: tzolov

Resolved by 9a8a133d9388e020109bb4f108ac22520760e00f @hambuger feel free to re-open the PR if the issue is still present.

Comment From: hambuger

Resolved by 9a8a133d9388e020109bb4f108ac22520760e00f

@hambuger feel free to re-open the PR if the issue is still present.

It is ok. I just provided another solution that I think is reasonable.