swift

4c45885f - [Name lookup] Diagnose attempts to reference not-yet-declared local variables.

[Name lookup] Diagnose attempts to reference not-yet-declared local variables. Until the point where ASTScope-based unqualified name lookup is the default, unqualified name lookup can still find names declared *after* the source location. The 'hasType' check no longer makes sense, so actually check the source location of the entity we found.