Rolling back r489734 - Boolean.valueOf(boolean) only available from JDK 1.4 onwards

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@490161 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/lang/mutable/MutableBoolean.java

@@ -121,7 +121,9 @@ public class MutableBoolean implements Mutable, Serializable, Comparable {
      * @return the value as a Boolean
      */
     public Object getValue() {
-        return Boolean.valueOf(this.value);
+        return new Boolean(this.value);
+// TODO: JDK 1.4+
+//        return Boolean.valueOf(this.value);
     }
 
     /**