Changed DivisiveSumNormalize so that it can accept a pre-calculated norm_value for the array, if one is known. If the pre-calculated value is equal to the current value, no normalization operation need occur.
Changed DivisiveSumNormalize so that it can accept a pre-calculated norm_value for the array, if one is known. If the pre-calculated value is equal to the current value, no normalization operation need occur.


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