Fix Natural/fold for GHCJS bindings
#985
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Fixes dhall-lang/dhall-lang#579 `Natural/fold` was misbehaving on GHCJS due to the use of `Natural` arithmetic (for some reason). This is a problem I've seen and fixed before, but needed to be fixed again after the migration to the new `Dhall.Eval` normalization engine. The fix is easy: use `Integer` instead of `Natural` for the accumulator of the fold and the bug disappears.
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Fixes dhall-lang/dhall-lang#579
Natural/foldwas misbehaving on GHCJS due to the use ofNaturalarithmetic (for some reason). This is a problem I've seen and fixed
before, but needed to be fixed again after the migration to the new
Dhall.Evalnormalization engine.The fix is easy: use
Integerinstead ofNaturalfor the accumulatorof the fold and the bug disappears.