- fetch.OscFileGrabber: fix for commit 9ab5a37113

We still have to support older urlgrabber versions where the class
"URLGrabber" is an old-style class and therefore we cannot use a "super(...)"
call. This fixes issue #32

osc/fetch.py

@@ -37,7 +37,9 @@ def join_url(self, base_url, rel_url):
 
 class OscFileGrabber(URLGrabber):
     def __init__(self, progress_obj = None):
-        super(OscFileGrabber, self).__init__()
+        # we cannot use super because we still have to support
+        # older urlgrabber versions where URLGrabber is an old-style class
+        URLGrabber.__init__(self)
         self.progress_obj = progress_obj
 
     def urlgrab(self, url, filename, text = None, **kwargs):