Owm schema

[fabaff]

Description:
Add missing key for validation.

Related issue (if applicable): fixes #2257

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#

Example entry for configuration.yaml (if applicable):

Checklist:

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io

If code communicates with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.

[Danielhiversen]

I do not think this will work.
I think you should change this line
https://github.com/home-assistant/home-assistant/pull/2256/files#diff-8a21420c1a82d8d153cf9bf19a150501L76 to:
if forecast:
Since "forecast" now will be a boolean and not an integer anymore.

Edit: (1 == True) is probably True? So it probably will work

[fabaff]

@Danielhiversen you are right but I changed it.