Possible conversion error when converting max/min values

[MrKevinWeiss]

During some corner case testing I got:

  File "\mm_pal\mm_if.py", line 761, in commit_write
    self.write_reg(reg, data, offset=offset, verify=verify,
  File "\mm_pal\mm_if.py", line 728, in write_reg
    self._write_formatted_bytes(reg_info, data, offset, size, timeout,
  File "\mm_pal\mm_if.py", line 674, in _write_formatted_bytes
    wb_data = self._write_data_to_bytes(reg_info, data)
  File "\mm_pal\mm_if.py", line 623, in _write_data_to_bytes
    wdata += element.to_bytes(reg_info['type_size'], "little",
OverflowError: int too big to convert

I was feeding it an array of int16_t with some of the values were -45567 or so I guess. I should look into it.