Make FieldDecl an invalid Entity since it has no linkage.

llvm-svn: 107605
diff --git a/clang/lib/Index/Entity.cpp b/clang/lib/Index/Entity.cpp
index fb3c7ae..0551ae5 100644
--- a/clang/lib/Index/Entity.cpp
+++ b/clang/lib/Index/Entity.cpp
@@ -126,8 +126,8 @@
 }
 
 Entity EntityGetter::VisitFieldDecl(FieldDecl *D) {
-  // Make FieldDecl an internal Entity.
-  return Entity(D);
+  // Make FieldDecl an invalid Entity since it has no linkage.
+  return Entity();
 }
 
 //===----------------------------------------------------------------------===//