Add two lints for cases where enum discriminants are no longer defined. #1037
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- `enum_discriminants_undefined_non_exhaustive_variant` checks for enums that gain a new non-exhaustive variant, which then causes the discriminant to become undefined. - `enum_discriminants_undefined_non_unit_variant` checks for enums that gain a new non-unit variant, which then causes the discriminant to become undefined. Resolves #898.
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enum_discriminants_undefined_non_exhaustive_variantchecks for enums that gain a new non-exhaustive variant, which then causes the discriminant to become undefined.enum_discriminants_undefined_non_unit_variantchecks for enums that gain a new non-unit variant, which then causes the discriminant to become undefined.Resolves #898.