Fix #4613

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/type/TypeParser.java

@@ -129,8 +129,8 @@ private static String _quoteTruncated(String str) {
         return String.format("'%s...'[truncated %d charaters]",
                 str.substring(0, 1000), str.length() - 1000);
     }
-    
-    final static class MyTokenizer extends StringTokenizer
+
+    final protected static class MyTokenizer extends StringTokenizer
     {
         protected final String _input;