Fix LoadErrorEventsNexus/PulseIndexer when there are zero events#38738

peterfpeterson merged 6 commits intomantidproject:release-nextmantidproject/mantid:release-nextfrom

rosswhitfield:fix_LoadErrorEventsNexus_zero_eventsrosswhitfield/mantid:fix_LoadErrorEventsNexus_zero_eventsCopy head branch name to clipboard