message: kx122: Fix for uninitialized variable w/release
  Fix so a release build doesn't flag reg_val as uninitialized.
diff: @@ -463,7 +463,7 @@ float kx122_get_sample_period(const kx122_context dev)
  {KX122_ODR_12800,128000},{KX122_ODR_25600,25600}
  };
  - uint8_t reg_val;
  + uint8_t reg_val = 0;
  kx122_read_register(dev,KX122_ODCNTL, &reg_val);
  reg_val = reg_val & KX122_ODCNTL_OSA_MASK;
  