Invalid schema for function 'get_current_weather': None is not of type 'object'

[mehulgohil]

Describe the bug
When calling CreateChatCompletion with function call getting error 400.
ChatCompletion error: error, status code: 400, message: Invalid schema for function 'get_current_weather': None is not of type 'object'

Expected behavior
Expected behaviorwas to return the function call definition

Screenshots/Logs

Environment (please complete the following information):

• go-openai version: [e.g. v1.12.0]
• Go version: [e.g. 1.18]
• OpenAI API version: [e.g. v1]
• OS: [e.g. Ubuntu 20.04]

[vvatanabe]

Duplicate #429

[vvatanabe]

Fixed #434