Resolve "Job Failed #408711: imaging_ecal_pion_rejection has...

Resolve "Job Failed #408711: imaging_ecal_pion_rejection has ZeroDivisionError: Weights sum to zero, can't be normalized"

benchmarks/imaging_ecal/scripts/draw_cluster_layers.py

@@ -110,7 +110,7 @@ if __name__ == '__main__':
     else:
         dfc = df[(df['eta'] <= df['eta'].quantile(0.95)) & (df['eta'] >= df['eta'].quantile(0.05)) &
                  (df['phi'] <= df['phi'].quantile(0.95)) & (df['phi'] >= df['phi'].quantile(0.05))]
-        vec = np.average(dfc[['x', 'y', 'z']].values, axis=0, weights=dfc['energy'].values)
+        vec = np.average(dfc[['x', 'y', 'z']].values, axis=0, weights= dfc['energy'].values if np.sum(dfc['energy'].values) > 0 else None)
     vec = vec/np.linalg.norm(vec)
 
     # particle line from (0, 0, 0) to the inner Ecal surface