DataStructure.h doesn't include DSGraph.h

llvm-svn: 4029
diff --git a/llvm/lib/Analysis/DataStructure/Printer.cpp b/llvm/lib/Analysis/DataStructure/Printer.cpp
index 528652b..82aa005 100644
--- a/llvm/lib/Analysis/DataStructure/Printer.cpp
+++ b/llvm/lib/Analysis/DataStructure/Printer.cpp
@@ -5,6 +5,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Analysis/DataStructure.h"
+#include "llvm/Analysis/DSGraph.h"
 #include "llvm/Module.h"
 #include "llvm/Assembly/Writer.h"
 #include "Support/CommandLine.h"