$$KL(Dm_i || Ce_i) = \sum_{j=0}^1 P(Dm_i = j) \cdot log \left [ \frac{P(Dm_i = j)}{P(Ce_i = j)} \right ]$$
$$KL(Dm_i || Ce_i) = \sum_{j=0}^1 log \left { \left [ \frac{P(Dm_i = j)}{P(Ce_i = j)} \right ]^{P(Dm_i = j)} \right }$$
$$KL(Dm_i || Ce_i) = 1 \cdot log \left [ \frac{1}{P(Ce_i = 0)} \right ] + 0$$