Fix build for clang r291753

llvm-svn: 291756
diff --git a/lldb/source/Symbol/ClangASTContext.cpp b/lldb/source/Symbol/ClangASTContext.cpp
index 3d37b70..49b2834 100644
--- a/lldb/source/Symbol/ClangASTContext.cpp
+++ b/lldb/source/Symbol/ClangASTContext.cpp
@@ -1528,8 +1528,7 @@
       *ast,
       decl_ctx, // What decl context do we use here? TU? The actual decl
                 // context?
-      SourceLocation(), decl_name, template_param_list, template_cxx_decl,
-      nullptr);
+      SourceLocation(), decl_name, template_param_list, template_cxx_decl);
 
   if (class_template_decl) {
     if (access_type != eAccessNone)