Fix minor bug I introduced :)

Author: cowtowncoder

cbor/src/main/java/com/fasterxml/jackson/dataformat/cbor/CBORConstants.java

@@ -113,6 +113,11 @@ public final class CBORConstants
 
     public final static int INT_BREAK = 0xFF;
 
+    /**
+     * Marker for "undefined" value in CBOR spec.
+     *
+     * @since 2.20
+     */
     public final static int SIMPLE_VALUE_UNDEFINED = 0xF7;
 
     /*

cbor/src/main/java/com/fasterxml/jackson/dataformat/cbor/CBORParser.java

@@ -49,15 +49,13 @@ public enum Feature implements FormatFeature
 
         /**
          * Feature that determines how an ` undefined ` value (0xF7) is decoded.
-         *
          * <p>
          * When enabled, the parser returns {@link JsonToken#VALUE_EMBEDDED_OBJECT} with a
          * value of {@code null}, allowing the caller to distinguish `undefined` from actual
          * {@link JsonToken#VALUE_NULL}.
          *<p>
          * When disabled (default, for backwards compatibility), `undefined` value is
-         * reported as {@link JsonToken#VALUE_NULL}, maintaining legacy behavior from Jackson 2.9.6 to 2.19.
-         *<p>
+         * reported as {@link JsonToken#VALUE_NULL}, maintaining legacy behavior from Jackson 2.10 to 2.19.
          *
          * @since 2.20
          */
@@ -1943,7 +1941,7 @@ private final byte[] _getBinaryFromString(Base64Variant variant) throws IOExcept
      * @since 2.20
      */
     public boolean isUndefined() {
-        if ((_currToken == JsonToken.VALUE_NULL) || (_currToken == JsonToken.VALUE_NULL)) {
+        if ((_currToken == JsonToken.VALUE_NULL) || (_currToken == JsonToken.VALUE_EMBEDDED_OBJECT)) {
             return (_inputBuffer != null)
                     && (_inputBuffer[_inputPtr - 1] & 0xFF) == SIMPLE_VALUE_UNDEFINED;
         }

cbor/src/test/java/com/fasterxml/jackson/dataformat/cbor/parse/UndefinedValueTest.java

@@ -14,7 +14,7 @@
 // for [dataformat-binary#93]
 public class UndefinedValueTest extends CBORTestBase
 {
-    private final static byte BYTE_UNDEFINED = (byte) 0xF7;
+    private final static byte BYTE_UNDEFINED = (byte) CBORConstants.SIMPLE_VALUE_UNDEFINED;
 
     private final CBORFactory CBOR_F = cborFactory();