Add exception handling for bad EvalAutomorphism indices
Currently a seg fault is thrown when there is no automorphism for the index. This affects all operations derived from EvalAutomorphism, namely EvalAtIndex, EvalSum, and similar operations.
Currently a seg fault is thrown when there is no automorphism for the index. This affects all operations derived from EvalAutomorphism, namely EvalAtIndex, EvalSum, and similar operations.