Broken iterator types for Connection.select

[gafusss]

Commit eca0e48 fixing #76 breaks iterators for select, always setting the iterator to either _ALL or _EQ

if iterator_type == None and \
           (key == None or (isinstance(key, (list, tuple)) and len(key) == 0)):
               iterator_type = ITERATOR_ALL
        else:
            iterator_type = ITERATOR_EQ

[bigbes]

@gafusss This mistake was made as a result of haste:) thank you very much for your time!