_emissionRate is zero if the minimum fund is not met as shown in the code logic below. 
https://github.com/GenerationSoftware/pt-v5-cgda-liquidator/blob/7f95bcacd4a566c2becb98d55c1886cadbaa8897/src/LiquidationPair.sol#L274-L283
As such, consider introducing checks on functions calls dependent on it when _emissionRate == 0. For example, it will be good if a check is implemented in function swapExactAmountOut to prevent division by zero in the function logic. 
https://github.com/GenerationSoftware/pt-v5-cgda-liquidator/blob/7f95bcacd4a566c2becb98d55c1886cadbaa8897/src/LiquidationPair.sol#L211-L226
