Initialize char* to nullptr (#2145)
Initialize char* to nullptr (#2145)

Signed-off-by: Eduardo Ponz Segrelles <cd06c2e9cb9b657226976502a1edebf7710250ce@eprosima.com>
eProsima/Fast-RTPS,eProsima/Fast-RTPS,eProsima/Fast-DDS,eProsima/Fast-RTPS,eProsima/Fast-DDS,eProsima/Fast-DDS,eProsima/Fast-RTPS,eProsima/Fast-RTPS,eProsima/Fast-DDS,eProsima/Fast-DDS