Correction of a variable type conversion
In the readMPU9250xyzValFromFifo the conversion of the bytes read from FIFO and their conversion into floats was not clean and seemded to not work with some compilers.
In the readMPU9250xyzValFromFifo the conversion of the bytes read from FIFO and their conversion into floats was not clean and seemded to not work with some compilers.