[ConstraintSystem] Switch ConstraintFix to use ASTNode instead of TypedNode

Author: xedin

lib/Sema/CSFix.cpp

@@ -34,7 +34,7 @@ using namespace constraints;
 
 ConstraintFix::~ConstraintFix() {}
 
-TypedNode ConstraintFix::getAnchor() const { return getLocator()->getAnchor(); }
+ASTNode ConstraintFix::getAnchor() const { return getLocator()->getAnchor(); }
 
 void ConstraintFix::print(llvm::raw_ostream &Out) const {
   Out << "[fix: ";

lib/Sema/CSFix.h

@@ -18,6 +18,7 @@
 #define SWIFT_SEMA_CSFIX_H
 
 #include "ConstraintLocator.h"
+#include "swift/AST/ASTNode.h"
 #include "swift/AST/Decl.h"
 #include "swift/AST/Expr.h"
 #include "swift/AST/Identifier.h"
@@ -313,7 +314,7 @@ class ConstraintFix {
   /// Retrieve anchor expression associated with this fix.
   /// NOTE: such anchor comes directly from locator without
   /// any simplication attempts.
-  TypedNode getAnchor() const;
+  ASTNode getAnchor() const;
   ConstraintLocator *getLocator() const { return Locator; }
 
 protected: