removed unneeded check for blank consumer key. Spec allows for blank keys anyways. Thanks Toby White.

git-svn-id: https://oauth.googlecode.com/svn/code/python@1009 f7ae4463-c52f-0410-a7dc-93bad6e629e8

Author: leah.culver

oauth/oauth.py

@@ -387,8 +387,6 @@ def _get_signature_method(self, oauth_request):
 
     def _get_consumer(self, oauth_request):
         consumer_key = oauth_request.get_parameter('oauth_consumer_key')
-        if not consumer_key:
-            raise OAuthError('Invalid consumer key.')
         consumer = self.data_store.lookup_consumer(consumer_key)
         if not consumer:
             raise OAuthError('Invalid consumer.')