Unbreak self-host.

llvm-svn: 104390
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index a4a4bda..74e64e5 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1844,7 +1844,7 @@
                                               const CXXZeroInitValueExpr *E) {
   QualType Ty = E->getType();
   LValue LV = LValue::MakeAddr(CreateMemTemp(Ty), MakeQualifiers(Ty));
-  EmitNullInitialization(LV.getAddress(), Ty);
+  EmitMemSetToZero(LV.getAddress(), Ty);
   return LV;
 }