Update make_WFMalarms.py

FIX minor sytnx error. check this if SPEC_Cond:
                SPEC_SUMRun=SUMRun
            else:
                SPEC_SUMRun=0
            if SPEC_Cond:
                SPEC_Pledge=pledge_SafeDivision
            else:
                SPEC_Pledge=0

if it is correct