Fixed: DHT12 incorrect value when temperature is negative. (#200)
Fixed: DHT12 incorrect value when temperature is negative. (#200)

* Fixed incorrect value when temperature is negative.

Corrected calculation by referring to the bit indicating whether the temperature is positive or negative (byte address 0x03, bit 8).

* add new-line in end-of-file.

m5stack/M5Stack,m5stack/M5Stack,m5stack/M5Stack