File fix-headers-update.patch of Package python-docker-py.17760

Index: docker-py-1.7.2/docker/utils/decorators.py
===================================================================
--- docker-py-1.7.2.orig/docker/utils/decorators.py
+++ docker-py-1.7.2/docker/utils/decorators.py
@@ -40,7 +40,7 @@ def minimum_version(version):
 def update_headers(f):
     def inner(self, *args, **kwargs):
         if 'HttpHeaders' in self._auth_configs:
-            if 'headers' not in kwargs:
+            if not kwargs.get('headers'):
                 kwargs['headers'] = self._auth_configs['HttpHeaders']
             else:
                 kwargs['headers'].update(self._auth_configs['HttpHeaders'])