Fixed compilation warnings

[floBik]

Removed unnecessary magReading variable in F_BMX055.cpp because it generated a warning that caused problems with some compiler setups. The initialisation of AccelData, GyroData, MagData and calData has been refactored as it was also generating warnings.

[floBik]

Hey @LiquidCGS,

Could you take a look at this PR to see if it works for you or if it needs some tweaking?

[FedericoBusero]

Also on RISC-V (ES32-C3) the zero-initialisation causes lots of warnings about incorrect initialisation.
The suggested solution however would create a problem when a new variable is added to the struct.

As a suggestion, I would rather create some defines in IMUBase.hpp

#define ACCELDATA_ZERO  { 0, 0, 0 }
#define GYRODATA_ZERO   { 0, 0, 0 }
#define CALDATA_ZERO    {0, {0,0,0},{0,0,0},{0,0,0},{0,0,0}}

[rafaelcamacho]

Also on RISC-V (ES32-C3) the zero-initialisation causes lots of warnings about incorrect initialisation. The suggested solution however would create a problem when a new variable is added to the struct.

As a suggestion, I would rather create some defines in IMUBase.hpp

#define ACCELDATA_ZERO  { 0, 0, 0 }
#define GYRODATA_ZERO   { 0, 0, 0 }
#define CALDATA_ZERO    {0, {0,0,0},{0,0,0},{0,0,0},{0,0,0}}

And

AccelData accel = { 0 };
GyroData gyro = { 0 };

to

AccelData accel = { 0.0f, 0.0f, 0.0f };
GyroData gyro = { 0.0f, 0.0f, 0.0f };