Ignore invalid -100°C temperature for `lumi.weather`
Ignore invalid -100°C temperature for `lumi.weather`

See #1748.

dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin