some corrections in sqlite3 storage

tiramisu/setting.py

@@ -191,7 +191,7 @@ class Settings(object):
         :param context: the root config
         :param storage: the storage type
 
-                        - dictionnary -> in memory
+                        - dictionary -> in memory
                         - sqlite3 -> persistent
         """
         # generic owner
@@ -271,7 +271,7 @@ class Settings(object):
         (never save properties if same has option properties)
         """
         if opt is None:
-            self._p_.setproperties(path, properties)
+            self._p_.setproperties(None, properties)
         else:
             if set(opt._properties) == properties:
                 self._p_.reset_properties(path)
@@ -380,7 +380,6 @@ class Settings(object):
 
         # filters the callbacks
         setting = Property(self, self._getproperties(opt, path, False), opt, path=path)
-        descr = self.context.cfgimpl_get_description()
         for requires in opt._requires:
             matches = False
             for require in requires: