Add back ctor for 1.6 to keep binary compatibility.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1201520 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/codec/StringEncoderComparator.java

@@ -34,6 +34,16 @@ public class StringEncoderComparator implements Comparator {
      */
     private final StringEncoder stringEncoder;
 
+    /**
+     * Constructs a new instance.
+     * 
+     * @deprecated Creating an instance without a {@link StringEncoder} leads to a {@link NullPointerException}. Will be
+     *             removed in 2.0.
+     */
+    public StringEncoderComparator() {
+        this.stringEncoder = null; // Trying to use this will cause things to break
+    }
+
     /**
      * Constructs a new instance with the given algorithm.
      *