such code

//z_play.c:
//=========================================================================================
    if (CVar_GetS32("gKeepMask", 0) != 0) {
        if (CVar_GetS32("gNoRestrictAge", 0) != 0) {
            if (gSaveContext.fileNum == 1) {
                CVar_SetS32("gMaskNum", player->currentMask);
            } else if (gSaveContext.fileNum == 2) {
                CVar_SetS32("gMaskNum_2", player->currentMask);
            } else if (gSaveContext.fileNum == 3) {
                CVar_SetS32("gMaskNum_3", player->currentMask);
            } else {
                CVar_SetS32("gMaskNum_debug", player->currentMask);
            }
        } else {
            if (gSaveContext.fileNum == 1 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                CVar_SetS32("gMaskNum", player->currentMask);
            } else if (gSaveContext.fileNum == 2 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                CVar_SetS32("gMaskNum_2", player->currentMask);
            } else if (gSaveContext.fileNum == 3 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                CVar_SetS32("gMaskNum_3", player->currentMask);
            } else if (LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                CVar_SetS32("gMaskNum_debug", player->currentMask);
            }
        }
    }

//z_player_lib.c
//=========================================================================================
        if (CVar_GetS32("gKeepMask", 0) != 0) {
            if (CVar_GetS32("gNoRestrictAge", 0) != 0) {
                if (gSaveContext.fileNum == 1) {
                    this->currentMask = CVar_GetS32("gMaskNum", 0);
                } else if (gSaveContext.fileNum == 2) {
                    this->currentMask = CVar_GetS32("gMaskNum_2", 0);
                } else if (gSaveContext.fileNum == 3) {
                    this->currentMask = CVar_GetS32("gMaskNum_3", 0);
                } else {
                    this->currentMask = CVar_GetS32("gMaskNum_debug", 0);
                }
            } else {
                if (gSaveContext.fileNum == 1 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                    this->currentMask = CVar_GetS32("gMaskNum", 0);
                } else if (gSaveContext.fileNum == 2 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                    this->currentMask = CVar_GetS32("gMaskNum_2", 0);
                } else if (gSaveContext.fileNum == 3 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                    this->currentMask = CVar_GetS32("gMaskNum_3", 0);
                } else if (gSaveContext.fileNum != 1 && gSaveContext.fileNum != 2 && gSaveContext.fileNum != 3 && LINK_AGE_IN_YEARS == LINK_IS_CHILD) {
                    this->currentMask = CVar_GetS32("gMaskNum_debug", 0);
                } else if (LINK_AGE_IN_YEARS != LINK_IS_CHILD) {
                    this->currentMask = PLAYER_MASK_NONE;
                }
            }
        }