I predict that HeaderSearch will need the ability to generate
diagnostics in the future. Make it so.

llvm-svn: 144347
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 2496f72..0b9c37a 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -664,7 +664,8 @@
   AST->FileMgr = new FileManager(FileSystemOpts);
   AST->SourceMgr = new SourceManager(AST->getDiagnostics(),
                                      AST->getFileManager());
-  AST->HeaderInfo.reset(new HeaderSearch(AST->getFileManager()));
+  AST->HeaderInfo.reset(new HeaderSearch(AST->getFileManager(),
+                                         AST->getDiagnostics()));
   
   for (unsigned I = 0; I != NumRemappedFiles; ++I) {
     FilenameOrMemBuf fileOrBuf = RemappedFiles[I].second;