Reuse forAddr to create ignored AggValueSlots.

Silences valgrind warnings about uninitalized alignment values.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146342 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGValue.h b/lib/CodeGen/CGValue.h
index b8fe2a2..744a6e0 100644
--- a/lib/CodeGen/CGValue.h
+++ b/lib/CodeGen/CGValue.h
@@ -357,11 +357,8 @@
   /// ignored - Returns an aggregate value slot indicating that the
   /// aggregate value is being ignored.
   static AggValueSlot ignored() {
-    AggValueSlot AV;
-    AV.Addr = 0;
-    AV.Quals = Qualifiers();
-    AV.DestructedFlag = AV.ObjCGCFlag = AV.ZeroedFlag = AV.AliasedFlag = false;
-    return AV;
+    return forAddr(0, CharUnits(), Qualifiers(), IsNotDestructed,
+                   DoesNotNeedGCBarriers, IsNotAliased);
   }
 
   /// forAddr - Make a slot for an aggregate value.