Merge pull request #24 from Natureshadow/master

Catches empty username on user search (closes #23).

src/yt/__init__.py

@@ -265,7 +265,7 @@ def _run_pager(self):
                         pass
             elif c == ord('u'): # user
                 s = self._input('user')
-                if s is not None:
+                if s is not None and len(s) > 0:
                     self._feed = user(s)
                     self._last_feed = None
                     self._ordering = 'published'