Properly hooked up the on close callback for output streams to AVM Nodes.

Got rid of a now superfluous setContentData() call, and now treat files
with no content url (yet) as having length 0.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3660 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/PlainFileNodeImpl.java

@@ -288,6 +288,10 @@ class PlainFileNodeImpl extends FileNodeImpl implements PlainFileNode
      */
     private long getFileLength()
     {
+        if (fContentURL == null)
+        {
+            return 0L;
+        }
         ContentReader reader = AVMContext.fgInstance.getContentStore().getReader(fContentURL);
         return reader.getSize();
     }