Add the missing compatibility warning for braced initializers as default arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153026 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 2fac0dc..6f344f6 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -4282,9 +4282,10 @@
                                                 Param);
 
           ExprResult DefArgResult;
-          if (Tok.is(tok::l_brace))
+          if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) {
+            Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
             DefArgResult = ParseBraceInitializer();
-          else
+          } else
             DefArgResult = ParseAssignmentExpression();
           if (DefArgResult.isInvalid()) {
             Actions.ActOnParamDefaultArgumentError(Param);