[atk] Unref STATE_TYPE class ref after using it at state_type_get_name

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit 25b8b225babe40ae484914bfb6ebc530c886131f
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Tue Nov 25 12:18:56 2014 +0100

    Unref STATE_TYPE class ref after using it at state_type_get_name

 atk/atkstate.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/atk/atkstate.c b/atk/atkstate.c
index b715c96..5d5bd17 100755
--- a/atk/atkstate.c
+++ b/atk/atkstate.c
@@ -93,6 +93,8 @@ atk_state_type_get_name (AtkStateType type)
         }
     }
 
+  g_type_class_unref (type_class);
+
   return name;
 }