Fix warnings caused by new CXXUuidofExprClass enumerator.

llvm-svn: 113444
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 089caf2..04aea9e 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -2379,6 +2379,7 @@
   case Expr::CXXMemberCallExprClass:
   case Expr::CXXDynamicCastExprClass:
   case Expr::CXXTypeidExprClass:
+  case Expr::CXXUuidofExprClass:
   case Expr::CXXNullPtrLiteralExprClass:
   case Expr::CXXThisExprClass:
   case Expr::CXXThrowExprClass: