libpldm: Modify the validation check on ActiveComponentVersionString
libpldm: Modify the validation check on ActiveComponentVersionString

ActiveComponentVersionStringLength in ComponentParameterTable can
be zero if the component is corrupted for any reason. Update
decode_get_firmware_parameters_resp_comp_entry to handle that
correctly.

Signed-off-by: Tom Joseph <b9c6330b74e9240496e23e0ead41648ed4172ac7@gmail.com>
Change-Id: I43624a9d55524db3ee77eb3f2d4ebe83a247597a

openbmc/pldm,openbmc/pldm,openbmc/pldm