Fixup unit tests for DiagnosticOptions change

llvm-svn: 166509
diff --git a/clang/unittests/AST/CommentLexer.cpp b/clang/unittests/AST/CommentLexer.cpp
index cc4535a..f8746d9 100644
--- a/clang/unittests/AST/CommentLexer.cpp
+++ b/clang/unittests/AST/CommentLexer.cpp
@@ -29,7 +29,7 @@
   CommentLexerTest()
     : FileMgr(FileMgrOpts),
       DiagID(new DiagnosticIDs()),
-      Diags(DiagID, new IgnoringDiagConsumer()),
+      Diags(DiagID, new DiagnosticOptions, new IgnoringDiagConsumer()),
       SourceMgr(Diags, FileMgr),
       Traits(Allocator) {
   }