Try to de-bork build of WPA

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100475 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/examples/wpa/clang-wpa.cpp b/examples/wpa/clang-wpa.cpp
index ae789fa..82d62e3 100644
--- a/examples/wpa/clang-wpa.cpp
+++ b/examples/wpa/clang-wpa.cpp
@@ -39,7 +39,8 @@
 
   for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
     const std::string &InFile = InputFilenames[i];
-    llvm::OwningPtr<ASTUnit> AST(ASTUnit::LoadFromPCHFile(InFile, *Diags));
+    llvm::OwningPtr<ASTUnit> AST(ASTUnit::LoadFromPCHFile(InFile, 
+                                                          OwnedDiags(*Diags)));
     if (!AST)
       return 1;