Add a return type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152614 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index e2ae678..5111dae 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -70,7 +70,7 @@
   }
 }
 
-SelectionDAG::DAGUpdateListener::anchor() {}
+void SelectionDAG::DAGUpdateListener::anchor() {}
 
 //===----------------------------------------------------------------------===//
 //                              ConstantFPSDNode Class