Changes to build successfully with GCC 3.02

llvm-svn: 1503
diff --git a/llvm/lib/Transforms/Utils/UnifyFunctionExitNodes.cpp b/llvm/lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
index efc7676..56c4b20 100644
--- a/llvm/lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
+++ b/llvm/lib/Transforms/Utils/UnifyFunctionExitNodes.cpp
@@ -11,6 +11,7 @@
 #include "llvm/iTerminators.h"
 #include "llvm/iPHINode.h"
 #include "llvm/Type.h"
+using std::vector;
 
 // UnifyAllExitNodes - Unify all exit nodes of the CFG by creating a new
 // BasicBlock, and converting all returns to unconditional branches to this