Add final modifier to private fields

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1811342 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/test/java/org/apache/commons/codec/digest/PureJavaCrc32CTest.java

@@ -28,7 +28,7 @@ public class PureJavaCrc32CTest {
 
     private final PureJavaCrc32C crc = new PureJavaCrc32C();
 
-    private byte[] data = new byte[32];
+    private final byte[] data = new byte[32];
 
     @Test
     public void testZeros() {