set original serialVersionUID of StreamCharBuffer so that serialized objects stored with previous Grails versions are compatible with latest changes.

Author: lhotari

src/java/org/codehaus/groovy/grails/web/util/StreamCharBuffer.java

@@ -223,6 +223,7 @@
  * @author Lari Hotari, Sagire Software Oy
  */
 public class StreamCharBuffer implements Writable, CharSequence, Externalizable {
+	static final long serialVersionUID = 5486972234419632945L;
 	private static final Log log=LogFactory.getLog(StreamCharBuffer.class);
 
     private static final int DEFAULT_CHUNK_SIZE = Integer.getInteger("streamcharbuffer.chunksize", 512);

src/test/org/codehaus/groovy/grails/web/util/StreamCharBufferTests.java

@@ -88,6 +88,10 @@ public void testSerialization() throws Exception {
 
         assertEquals("ABCDE", charBuffer.toString());
         assertEquals(5, charBuffer.size());
+        
+        charBuffer.getWriter().write("12345");
+        assertEquals("ABCDE12345", charBuffer.toString());
+        assertEquals(10, charBuffer.size());
     }
 
     public void testBufferedConnectedStringWriting() throws IOException {