This fixes a numerical overflow issue.  The code skips the clamping step
for linear and NN interpolation for better performance, but for high-order
interpolation, it needs to clamp the result to the range of the output
scalar type.  A bug caused it to incorrectly skip the clamping if a high
order interpolator was set with SetInterpolator(), but only for the
"PermuteExecute" code path that is used for rotations that are precise
multiples of 90 degrees.