[postr] Fix typo in error logging in Twisted callback

[Germán Poó Caamaño <gpoo src gnome org>]

commit 48b510f1b2eb4a903603a4293d6b5c8af8f29ac0
Author: Bruce Guenter <bruce untroubled org>
Date:   Sun Apr 13 14:07:04 2014 -0600

    Fix typo in error logging in Twisted callback
    
    self.log.err is undefined, should have read simply log.err

 src/postr.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/postr.py b/src/postr.py
index b6f4be2..5418edd 100644
--- a/src/postr.py
+++ b/src/postr.py
@@ -1149,7 +1149,7 @@ class Postr(UniqueApp):
             d.addErrback(log.err)
         else:
             d.addCallbacks(self.upload, self.upload_error)
-            d.addErrback(self.log.err)
+            d.addErrback(log.err)
             self.upload_progress_tracker.complete_extra_step(EXTRA_STEP_NEW_SET)
 
     def create_photoset_then_continue(self, rsp, photoset_name):