Test the 4 unsigned integers separately. No UnsignedInteger.

Author: sjrd

src/library/scala/runtime/BoxesRunTime.java

@@ -129,7 +129,8 @@ public static boolean equals2(Object x, Object y) {
             return equalsNumObject((java.lang.Number)x, y);
         if (x instanceof java.lang.Character)
             return equalsCharObject((java.lang.Character)x, y);
-        if (x instanceof scala.runtime.UnsignedInteger)
+        if (x instanceof scala.UInt || x instanceof scala.ULong ||
+            x instanceof scala.UByte || x instanceof scala.UShort)
             return equalsUNumObject(x, y);
         if (y instanceof scala.math.ScalaNumber)
             return y.equals(x);