Fix the C++11 build. I hate narrowing conversions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159543 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/SubtargetEmitter.cpp b/utils/TableGen/SubtargetEmitter.cpp
index adfd416..8089908 100644
--- a/utils/TableGen/SubtargetEmitter.cpp
+++ b/utils/TableGen/SubtargetEmitter.cpp
@@ -498,7 +498,7 @@
       unsigned Find = ItinClassesMap[Name];
 
       // Set up itinerary as location and location + stage count
-      unsigned NumUOps = ItinData->getValueAsInt("NumMicroOps");
+      int NumUOps = ItinData->getValueAsInt("NumMicroOps");
       InstrItinerary Intinerary = { NumUOps, FindStage, FindStage + NStages,
                                     FindOperandCycle,
                                     FindOperandCycle + NOperandCycles};