fix compile without named fields

fixed_wide_vectors/src/matrix.rs

@@ -13,4 +13,5 @@ crate::impl_matrix_extend!(3,2);
 crate::impl_matrix_extend!(3,3);
 
 //Special case 3x3 matrix operations because I cba to write macros for the arbitrary cases
+#[cfg(feature="named-fields")]
 crate::impl_matrix_3x3!();

fixed_wide_vectors/src/tests/fixed_wide.rs

@@ -63,6 +63,7 @@ fn wide_matrix_dot(){
 }
 
 #[test]
+#[cfg(feature="named-fields")]
 fn wide_matrix_det(){
 	let m=Matrix3::new([
 		[Planar64::from(1),Planar64::from(2),Planar64::from(3)],
@@ -75,6 +76,7 @@ fn wide_matrix_det(){
 }
 
 #[test]
+#[cfg(feature="named-fields")]
 fn wide_matrix_adjugate(){
 	let m=Matrix3::new([
 		[Planar64::from(1),Planar64::from(2),Planar64::from(3)],

fixed_wide_vectors/src/vector.rs

@@ -15,4 +15,5 @@ crate::impl_vector_extend!(2);
 crate::impl_vector_extend!(3);
 
 //cross product
+#[cfg(feature="named-fields")]
 crate::impl_vector_3!();