- bugfix in new_translation

- new register_translation_fft function

src/register.rs

@@ -175,7 +175,7 @@ impl<D: Dimension> Registration<D> {
         } else {
             return Err(Error::NumberOfDimensionsNotDefined);
         };
-        let mut fixed_mu = vec![Some(0.0); ndim * ndim];
+        let mut fixed_mu = vec![Some(0.0); ndim * ndim + ndim];
         for i in 0..ndim {
             fixed_mu[i * (ndim + 1)] = Some(1.0);
             fixed_mu[ndim * ndim + i] = None;