Fix VC++ compilation error.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25604 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGList.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGList.cpp
index 892fcda..0696c3f 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGList.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGList.cpp
@@ -341,7 +341,7 @@
 }
 
 void ScheduleDAGList::BuildSchedUnits() {
-  for (unsigned i = 0, N = NodeCount; i < N; i++) {
+  for (unsigned i = 0, NC = NodeCount; i < NC; i++) {
     NodeInfo *NI = &Info[i];
     SDNode *N = NI->Node;
     if (!isPassiveNode(N)) {