Fixed #9399 -- Added StopFutureHandlers to export list in file handling.

Thanks, George Vilches.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9992 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/files/uploadhandler.py

@@ -13,7 +13,7 @@
 
 __all__ = ['UploadFileException','StopUpload', 'SkipFile', 'FileUploadHandler',
            'TemporaryFileUploadHandler', 'MemoryFileUploadHandler',
-           'load_handler']
+           'load_handler', 'StopFutureHandlers']
 
 class UploadFileException(Exception):
     """
@@ -44,7 +44,7 @@ class SkipFile(UploadFileException):
     This exception is raised by an upload handler that wants to skip a given file.
     """
     pass
-    
+
 class StopFutureHandlers(UploadFileException):
     """
     Upload handers that have handled a file and do not want future handlers to