Wagon 1.0-beta-3 changes

Hello,

I've been playing around with HTTP Wagon a bit, mainly to handle recursive file downloads from remote servers. When I tried the latest version (beta-3) I came across few issues:
 * Empty file transfers seems to cause NPE:
 
     java.lang.NullPointerException
        at org.apache.maven.wagon.LazyFileOutputStream.flush(LazyFileOutputStream.java:77)
        at org.apache.maven.wagon.AbstractWagon.transfer(AbstractWagon.java:491)
        at org.apache.maven.wagon.AbstractWagon.getTransfer(AbstractWagon.java:325)
        at org.apache.maven.wagon.AbstractWagon.getTransfer(AbstractWagon.java:297)
        at org.apache.maven.wagon.AbstractWagon.getTransfer(AbstractWagon.java:274)
        at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:97)
        at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61)

 * HttpWagon.getFileList(String) doesn't seem to return anything when used with empty string arg. Previously it used to return the list of files of the base URL where it was connected.

I used previously beta-2 and both of the previously mentioned issues worked fine there.

Thanks