CutFlowSvc: Ignore stream name of event-less files Fix ATEAM-757
The EventStreamInfo object of event-less files is, by necessity, empty. That means, de-referencing the first element of the vector containing the stream names that produced the file causes problems. So, ignore the stream name when this vector is empty --- noting that this implies an event-less file was encountered. The assumption here is that the file was produced by the correct stream and just cannot be looked up here.
Edited by Frank Berghaus