Fixes Vector test for scale commutativeness.

src/Avalonia.Visuals/Vector.cs

@@ -82,6 +82,15 @@ namespace Avalonia
         public static Vector operator *(Vector vector, double scale)
             => Multiply(vector, scale);
 
+        /// <summary>
+        /// Scales a vector.
+        /// </summary>
+        /// <param name="vector">The vector.</param>
+        /// <param name="scale">The scaling factor.</param>
+        /// <returns>The scaled vector.</returns>
+        public static Vector operator *(double scale, Vector vector)
+            => Multiply(vector, scale);
+
         /// <summary>
         /// Scales a vector.
         /// </summary>