Fix weatheralerts: "Special Weather" Alert Type Not Found

[shaulbd]

Fixes: #206

In the original code, the !alertType condition was used to check for a missing alert type. However, it had the unintended effect of returning true for alert types with a value of 0. This was problematic because 0 was used for "Special Weather" and "Special Marine".

The modified code uses alertType === undefined to explicitly check for a missing alert type while preserving the expected behavior for other valid numbered values.

[MrBartusek]

Hey, thanks for this PR! There is something wrong with the new line characters in this PR. I've added .gitattributes file to the master, please rebase this PR and it should fix itself.

[MrBartusek]

[MrBartusek]

I converted the file to LF and git fixed it automatically apparently

[MrBartusek]

Hey thanks for this PR! It indeed seems to fix this problem! Can you also fix alert level check likewise?

MeteoalarmCard/src/integrations/weatheralerts.ts

Lines 118 to 120 in 32d5d79

	if(!alertLevel) {
	throw Error(`Unknown weatheralerts alert level: ${fullAlertName}`);
	}

[MrBartusek]

Thank you!