support for unexpected nTelegraphEnable values
support for unexpected nTelegraphEnable values

This change corrects the issue raised in https://github.com/NeuralEnsemble/python-neo/issues/544
samuelgarcia/python-neo,NeuralEnsemble/python-neo,rgerkin/python-neo,apdavison/python-neo,JuliaSprenger/python-neo,INM-6/python-neo