swift234

fix <rdar://problem/18734297> Reject access to local variables from local types

init()'s implicitly evaluate the initial values for properties, and we aren't modeling
that correctly in the AST.  This prevented the closure checker from noticing these 
accesses, leading to SILGen crashing later.  In the absence of proper AST modeling of
this, add special case handling for them.



Swift SVN r29508