bug 415302

Patch to protect against null input's.

-=david=-

Signed-off-by: David Harrigan <dharrigan@gmail.com>

jetty-util/src/main/java/org/eclipse/jetty/util/QuotedStringTokenizer.java

@@ -340,6 +340,9 @@ public class QuotedStringTokenizer
      */
     public static void quoteOnly(Appendable buffer, String input)
     {
+        if(input==null)
+            return;
+
         try
         {
             buffer.append('"');
@@ -366,6 +369,9 @@ public class QuotedStringTokenizer
      */
     public static void quote(Appendable buffer, String input)
     {
+        if(input==null)
+            return;
+
         try
         {
             buffer.append('"');