Namespace qualify debugging code

llvm-svn: 1921
diff --git a/llvm/lib/Transforms/LevelRaise.cpp b/llvm/lib/Transforms/LevelRaise.cpp
index 630ee0f..2eafcf0 100644
--- a/llvm/lib/Transforms/LevelRaise.cpp
+++ b/llvm/lib/Transforms/LevelRaise.cpp
@@ -26,7 +26,7 @@
 
 #ifdef DEBUG_PEEPHOLE_INSTS
 #define PRINT_PEEPHOLE(ID, NUM, I)            \
-  cerr << "Inst P/H " << ID << "[" << NUM << "] " << I;
+  std::cerr << "Inst P/H " << ID << "[" << NUM << "] " << I;
 #else
 #define PRINT_PEEPHOLE(ID, NUM, I)
 #endif