Merge pull request #74 from davvid/setqflist

pyflakes.vim: pass a valid action to setqflist

Author: kevinw

ftplugin/python/pyflakes.vim

@@ -277,7 +277,7 @@ EOF
                 call setqflist(b:qf_list, 'r')
             else
                 " one pyflakes quickfix window for all buffer
-                call setqflist(b:qf_list, '')
+                call setqflist(b:qf_list, ' ')
                 let s:pyflakes_qf = s:GetQuickFixStackCount()
             endif
         endif