Unbreak msvc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139581 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeCalc.cpp b/lib/CodeGen/LiveRangeCalc.cpp
index 21eaa15..eedf924 100644
--- a/lib/CodeGen/LiveRangeCalc.cpp
+++ b/lib/CodeGen/LiveRangeCalc.cpp
@@ -47,7 +47,7 @@
       // The value is live-through, update LiveOut as well.  Defer the Domtree
       // lookup until it is needed.
       assert(Seen.test(MBB->getNumber()));
-      LiveOut[MBB] = LiveOutPair(VNI, 0);
+      LiveOut[MBB] = LiveOutPair(VNI, (MachineDomTreeNode *)0);
     }
   }
   LiveIn.clear();