Remove some unneccesary 'using' directives


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4246 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/DataStructure/DataStructure.cpp b/lib/Analysis/DataStructure/DataStructure.cpp
index b75d8dc..d40be44 100644
--- a/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/lib/Analysis/DataStructure/DataStructure.cpp
@@ -386,7 +386,7 @@
 DSGraph::~DSGraph() {
   FunctionCalls.clear();
   ValueMap.clear();
-  RetNode = 0;
+  RetNode.setNode(0);
 
 #ifndef NDEBUG
   // Drop all intra-node references, so that assertions don't fail...