minor fix of viz_raw_ssp_events
minor fix of viz_raw_ssp_events

ktavabi/mnefun,LABSN/mnefun,Eric89GXL/mnefun,kambysese/mnefun,drammock/mnefun,Eric89GXL/mnefun,ktavabi/mnefun,LABSN/mnefun,kambysese/mnefun,drammock/mnefun