[library-web] do not try to download tarballs we didn't find

[Frederic Peters <fpeters src gnome org>]

commit 8e1266a9e718e4de43bf51aa6b6174fff5f3bc00
Author: Frédéric Péters <fpeters 0d be>
Date:   Wed Aug 26 17:03:58 2009 +0200

    do not try to download tarballs we didn't find

 src/lgo.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/lgo.py b/src/lgo.py
index d95f906..35757c6 100755
--- a/src/lgo.py
+++ b/src/lgo.py
@@ -282,6 +282,8 @@ class Lgo(App):
                 def filenames_cmp(x, y):
                     return version_cmp(x[len(module)+1:-8], y[len(module)+1:-8])
                 filenames.sort(filenames_cmp)
+                if not filenames:
+                    continue
                 version_href = '%s%s/%s' % (
                         base_module_href, version_dir, filenames[-1])
                 extra_filenames.append(self.ftp_gnome_org.download(version_href)[0])