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.h b/lib/CodeGen/LiveRangeCalc.h
index 55e67bb..b8c8585 100644
--- a/lib/CodeGen/LiveRangeCalc.h
+++ b/lib/CodeGen/LiveRangeCalc.h
@@ -191,7 +191,7 @@
   /// addLiveInBlock().
   void setLiveOutValue(MachineBasicBlock *MBB, VNInfo *VNI) {
     Seen.set(MBB->getNumber());
-    LiveOut[MBB] = LiveOutPair(VNI, 0);
+    LiveOut[MBB] = LiveOutPair(VNI, (MachineDomTreeNode *)0);
   }
 
   /// addLiveInBlock - Add a block with an unknown live-in value.  This