Fix warning

llvm-svn: 4649
diff --git a/llvm/lib/Transforms/Instrumentation/ProfilePaths/ProfilePaths.cpp b/llvm/lib/Transforms/Instrumentation/ProfilePaths/ProfilePaths.cpp
index b0c15f7..bc815c6 100644
--- a/llvm/lib/Transforms/Instrumentation/ProfilePaths/ProfilePaths.cpp
+++ b/llvm/lib/Transforms/Instrumentation/ProfilePaths/ProfilePaths.cpp
@@ -87,7 +87,7 @@
   std::vector<Edge> edges;
 
   Node *tmp;
-  Node *exitNode, *startNode;
+  Node *exitNode = 0, *startNode = 0;
 
   // The nodes must be uniquesly identified:
   // That is, no two nodes must hav same BB*