Fix for issue #2117

Author: brianpopow

src/ImageSharp/PixelFormats/PixelImplementations/Bgra32.cs

@@ -149,7 +149,7 @@ public uint PackedValue
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public void FromVector4(Vector4 vector) => this.Pack(ref vector);
+        public void FromVector4(Vector4 vector) => this.Pack(vector);
 
         /// <inheritdoc/>
         [MethodImpl(InliningOptions.ShortMethod)]
@@ -302,7 +302,7 @@ public void FromRgba64(Rgba64 source)
         /// </summary>
         /// <param name="vector">The vector containing the values to pack.</param>
         [MethodImpl(InliningOptions.ShortMethod)]
-        private void Pack(ref Vector4 vector)
+        private void Pack(Vector4 vector)
         {
             vector *= MaxBytes;
             vector += Half;