Problem granting usage on language c

When I try to grant usage on language c in 7.3b1 I get an error message
saying I can't because the language isn't trusted. Is this different in b2?
I can see using whether or not a language is trusted to set defaults,
but now that access can be controlled it would be useful to grant
access to load c functions to users that are trusted.

Here is the example:
grant usage on language c to bruno;
ERROR:  language "c" is not trusted