skip new global sum again

ForwardDetectors/ZDC/ZdcNtuple/Root/ZdcNtuple.cxx

@@ -668,6 +668,7 @@ void ZdcNtuple::processZdcNtupleFromModules()
   {
     for (const auto zdcMod : *m_zdcModules)
     {
+      if (zdcMod->zdcSide()==0) continue; // skip new global sum
       int iside = 0;
       if (zdcMod->zdcSide() > 0) iside = 1;
       int imod = zdcMod->zdcModule();