In typo-correction, pass down the TypeChecker as the LazyResolver.

This should restore the invariant that various places in the AST
are looking for, which is that declarations are considered invalid
if they don't have certain things set.

Author: rjmccall

lib/Sema/TypeCheckNameLookup.cpp

@@ -504,7 +504,7 @@ void TypeChecker::performTypoCorrection(DeclContext *DC, DeclRefKind refKind,
     entries.insert(distance, std::move(decl));
   });
 
-  lookupVisibleDecls(consumer, DC, nullptr, /*top level*/ true, nameLoc);
+  lookupVisibleDecls(consumer, DC, this, /*top level*/ true, nameLoc);
 
   // Impose a maximum distance from the best score.
   entries.filterMaxScoreRange(MaxCallEditDistanceFromBestCandidate);