[Bleeding] Fixed MapPalette.imageToBytes to properly handle transparency. Addresses BUKKIT-852

By: SpaceManiac <tad.hardesty@platymuus.com>

paper-api/src/main/java/org/bukkit/map/MapPalette.java

@@ -97,7 +97,7 @@ public final class MapPalette {
 
         byte[] result = new byte[temp.getWidth() * temp.getHeight()];
         for (int i = 0; i < pixels.length; i++) {
-            result[i] = matchColor(new Color(pixels[i]));
+            result[i] = matchColor(new Color(pixels[i], true));
         }
         return result;
     }