Support 6.10
Support 6.10

We use mkNorepType instead of mkNoRepType since the latter isn't available in
6.10. The former, however, is deprecated in 6.12 and later versions which
leads to warnings. I'd be interested to know what portable code is supposed to
look like in this particular case.

seckcoder/vector,phadej/vector,dolio/vector,hvr/vector,phaazon/vector,thomie/vector