swift234

In a currying forwarder, force the release of the data allocation
between the point at which values were loaded out and the point
at which the call is performed.  This is bad for some things,
like not spilling all the arguments, and good for others, like
not keeping the allocation around unnecessarily and being able
to do a tail call.

This has the side-effect of causing the release to actually occur,
since we're not doing cleanups yet.

Swift SVN r1276