In bma4.c the function bma4_get_temperature() returns incorrect values for negative temperatures

[john-rubis]

There appears to be a casting issue in this function that is causing negative temperatures to be returned as larger positive values.

Specifically in this line : temp_raw_scaled = (int32_t)data[BMA4_TEMP_BYTE] * BMA4_SCALE_TEMP;

Test case to demonstrate: set data = 0x81 

The expected return value in deg C would be -104C

Actual return value is 152,000 C

[BSTRobin]

Hi john-rubis,

In this function bma4_get_temperature(), temp_unit supported BMA4_FAHREN and BMA4_KELVIN, not supported BMA4_DEG.