fixes issue #341, logger outputed invalid path name

rhodecode/model/scm.py

@@ -150,11 +150,11 b' class ScmModel(BaseModel):'
         :param repos_path: path to directory containing repositories
         """
 
-        log.info('scanning for repositories in %s', repos_path)
-
         if repos_path is None:
             repos_path = self.repos_path
 
+        log.info('scanning for repositories in %s' % repos_path)
+
         baseui = make_ui('db')
         repos = {}