From 6dc29547fefca6b58e6e06722dc0b186725f1f63 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Sun, 10 Aug 2014 20:01:49 +0200
Subject: [PATCH] * src/graph/ngraph.hh (names): Fix constness.

---
 src/graph/ngraph.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/graph/ngraph.hh b/src/graph/ngraph.hh
index 42a97816e..f68d02c42 100644
--- a/src/graph/ngraph.hh
+++ b/src/graph/ngraph.hh
@@ -99,7 +99,7 @@ namespace spot
       return name_to_state.find(n) != name_to_state.end();
     }
 
-    state_to_name_t& names()
+    const state_to_name_t& names() const
     {
       return state_to_name;
     }