Fix UB in test

Author: calebzulawski

crates/core_simd/tests/ops_impl/float_macros.rs

@@ -388,8 +388,8 @@ macro_rules! float_tests {
                     0.0,
                     -1.0,
                     1.0,
-                    <$scalar>::MIN,
-                    -<$scalar>::MIN,
+                    <$int_scalar>::MAX as $scalar,
+                    <$int_scalar>::MIN as $scalar,
                     <$scalar>::MIN_POSITIVE,
                     -<$scalar>::MIN_POSITIVE,
                     <$scalar>::EPSILON,