Use NextOffset when laying out a field.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82828 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/empty-class-layout.cpp b/test/SemaCXX/empty-class-layout.cpp
index ce65065..e4e62aa 100644
--- a/test/SemaCXX/empty-class-layout.cpp
+++ b/test/SemaCXX/empty-class-layout.cpp
@@ -57,3 +57,8 @@
 
 struct S6 : S5 { };
 SA(10, sizeof(S6) == 2);
+
+struct S7 : Empty {
+  void *v;
+};
+SA(11, sizeof(S7) == 8);