fix the memory issue when add brighter-fatter

ObservationSim/Instrument/Chip/ChipUtils.py

@@ -191,6 +191,6 @@ def add_brighter_fatter(img):
     arr_imc[:]= np.zeros(nn)
 
     lib_bf.addEffects(nx, ny, arr_ima, arr_imc, bit_flag)
-    img.array[:, :] = np.array(arr_imc[:]).reshape([nx, ny])
+    img.array[:, :] = np.reshape(arr_imc, [nx, ny])
     del arr_ima, arr_imc
     return img
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