Fix HLTElectronPFMTFilter problem (2014 run-1 HLT menu)

Fix HLTElectronPFMTFilter problem (2014 run-1 HLT menu)
Fixes the HLT addOn problem reported here:
https://cmssdt.cern.ch/SDT/cgi-bin//showAddOnLogs.py/slc6_amd64_gcc481/www/sun/7.2-sun-02/CMSSW_7_2_X_2014-11-30-0200/addOnTests/