Fixed another optimized build problem.
No functionality change.

llvm-svn: 166140
diff --git a/poolalloc/lib/DSA/SanityCheck.cpp b/poolalloc/lib/DSA/SanityCheck.cpp
index b8b7128..a75fcb8 100644
--- a/poolalloc/lib/DSA/SanityCheck.cpp
+++ b/poolalloc/lib/DSA/SanityCheck.cpp
@@ -87,11 +87,15 @@
   // of the load is loaded.
   //
   DSNode::LinkMapTy::iterator linki = PtrNode->edge_begin();
+#ifndef NDEBUG
   bool found = false;
+#endif
   for (; linki != PtrNode->edge_end(); ++linki) {
     DSNodeHandle & LinkNode = linki->second;
     if (LinkNode.getNode() == ResultNode) {
+#ifndef NDEBUG
       found = true;
+#endif
     }
   }