JavaMail: fixed VANISH range

app/src/main/java/com/sun/mail/imap/IMAPFolder.java

@@ -3644,8 +3644,9 @@ public class IMAPFolder extends Folder implements UIDFolder, ResponseHandler {
 		long[] luid = UIDSet.toArray(uidset);
 		Message[] msgs = createMessagesForUIDs(luid);
 		for (Message m : msgs) {
-		    if (m.getMessageNumber() > 0)
-			messageCache.expungeMessage(m.getMessageNumber());
+			// Avoid creating seqnums
+		    if (m != null)
+			((IMAPMessage)m).setExpunged(true);
 		}
 		if (doExpungeNotification && hasMessageCountListener) {
 		    notifyMessageRemovedListeners(true, msgs);

app/src/main/java/com/sun/mail/imap/MessageCache.java

@@ -217,8 +217,8 @@ public class MessageCache {
 	int newnum = 1;
 	while (oldnum <= size) {
 	    // is message expunged?
-	    if (seqnumOf(oldnum) <= 0) {
 		IMAPMessage m = getMessage(oldnum);
+	    if (seqnumOf(oldnum) <= 0 || (m !=null && m.isExpunged())) {
 		mlist.add(m);
 	    } else {
 		// keep this message