Fix python-mode#554

Author: klen

pymode/lint.py

@@ -73,6 +73,8 @@ def __sort(e):
 
     for e in errors:
         e._info['bufnr'] = env.curbuf.number
+        if e._info['col'] is None:
+            e._info['col'] = 1
 
     env.run('g:PymodeLocList.current().extend', [e._info for e in errors])