CASTOR-4965 Users cannot compile CASTOR v15

mediachanger/castorrmc/common/serror.c

mediachanger/castorrmc/common/strerror_r_wrapper.cpp

mediachanger/castorrmc/h/Cinit.h

mediachanger/castorrmc/h/net.h

mediachanger/castorrmc/h/rmc_api.h

mediachanger/castorrmc/h/rmc_constants.h

mediachanger/castorrmc/h/rmc_logit.h

mediachanger/castorrmc/h/rmc_logreq.h

mediachanger/castorrmc/h/rmc_marshall_element.h

mediachanger/castorrmc/h/rmc_send_scsi_cmd.h

mediachanger/castorrmc/h/rmc_sendrep.h

mediachanger/castorrmc/h/rmc_smcsubr.h

mediachanger/castorrmc/h/rmc_smcsubr2.h

mediachanger/castorrmc/h/smc_struct.h

mediachanger/castorrmc/rmc/rmc_dismount.c

mediachanger/castorrmc/rmc/rmc_errmsg.c

mediachanger/castorrmc/rmc/rmc_export.c

mediachanger/castorrmc/rmc/rmc_find_cartridge.c

mediachanger/castorrmc/rmc/rmc_get_geometry.c

mediachanger/castorrmc/rmc/rmc_import.c