Fix thinko.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99788 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGVTT.cpp b/lib/CodeGen/CGVTT.cpp
index 6b21046..888dcd1 100644
--- a/lib/CodeGen/CGVTT.cpp
+++ b/lib/CodeGen/CGVTT.cpp
@@ -166,7 +166,7 @@
                                   const CXXRecordDecl *VTableClass,
                                   const AddressPointsMapTy& AddressPoints) {
   // Store the vtable pointer index if we're generating the primary VTT.
-  if (Base.getBase() == MostDerivedClass) {
+  if (VTableClass == MostDerivedClass) {
     assert(!SecondaryVirtualPointerIndices.count(Base) &&
            "A virtual pointer index already exists for this base subobject!");
     SecondaryVirtualPointerIndices[Base] = VTTComponents.size();