GaudiExamples Fix ntuple algorithm ubsan error
Addresses
/workspace/build/GAUDI/GAUDI_HEAD/GaudiExamples/src/NTuples/NTupleAlgorithm.cpp:71:24: runtime error: signed integer overflow: 1740 * 1234567 cannot be represented in type 'int'
Addresses
/workspace/build/GAUDI/GAUDI_HEAD/GaudiExamples/src/NTuples/NTupleAlgorithm.cpp:71:24: runtime error: signed integer overflow: 1740 * 1234567 cannot be represented in type 'int'