Static pressure.

    Args:
        msg (String): 28 bytes hexadecimal message string

    Returns:
        int: static pressure in hPa

def p44(msg):
    """Static pressure.

    Args:
        msg (String): 28 bytes hexadecimal message string

    Returns:
        int: static pressure in hPa

    """
    d = hex2bin(data(msg))

    if d[34] == '0':
        return None

    p = bin2int(d[35:46])    # hPa

    return p