Fix the release build, noticed by Eric van Riet Paap

llvm-svn: 23215
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index cf8d04e..b6034ec 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -29,7 +29,7 @@
 ViewDAGs("view-sched-dags", cl::Hidden,
          cl::desc("Pop up a window to show sched dags as they are processed"));
 #else
-static const bool ViewDAGS = 0;
+static const bool ViewDAGs = 0;
 #endif
 
 namespace {