largefiles: don't convert dest=None to dest=hg.defaultdest() in clone command

A status message is output if hg.clone() determines the default destination
because None was provided.  The previous code never passed None to hg.clone().

hgext/largefiles/overrides.py

@@ -720,12 +720,13 b' def overridepull(orig, ui, repo, source='
     return result
 
 def overrideclone(orig, ui, source, dest=None, **opts):
-    if dest is None:
-        dest = hg.defaultdest(source)
-    if opts.get('all_largefiles') and not hg.islocal(dest):
+    d = dest
+    if d is None:
+        d = hg.defaultdest(source)
+    if opts.get('all_largefiles') and not hg.islocal(d):
             raise util.Abort(_(
             '--all-largefiles is incompatible with non-local destination %s' %
-            dest))
+            d))
     result = hg.clone(ui, opts, source, dest,
                       pull=opts.get('pull'),
                       stream=opts.get('uncompressed'),

tests/test-largefiles.t

@@ -707,6 +707,16 b' Test cloning with --all-largefiles flag'
   commit: (clean)
   update: 8 new changesets (update)
 
+  $ mkdir xyz
+  $ cd xyz
+  $ hg clone ../a
+  destination directory: a
+  updating to branch default
+  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  getting changed largefiles
+  3 largefiles updated, 0 removed
+  $ cd ..
+
   $ hg clone --all-largefiles a ssh://localhost/a
   abort: --all-largefiles is incompatible with non-local destination ssh://localhost/a
   [255]