[libgdata] freebase: Add missing volatile hint on refcount counter

[Carlos Garnacho <carlosg src gnome org>]

commit 16886071e9f16a2833b4599e5a68fbe370b8aa30
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 27 02:53:45 2014 +0200

    freebase: Add missing volatile hint on refcount counter
    
    That is manipulated through atomic operators and should be marked as such.

 .../freebase/gdata-freebase-topic-result.c         |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdata/services/freebase/gdata-freebase-topic-result.c 
b/gdata/services/freebase/gdata-freebase-topic-result.c
index 5357bbb..085ec5a 100644
--- a/gdata/services/freebase/gdata-freebase-topic-result.c
+++ b/gdata/services/freebase/gdata-freebase-topic-result.c
@@ -85,7 +85,7 @@ struct _GDataFreebaseTopicValue {
        gchar *creator;
        gint64 timestamp;
        GValue value;
-       gint ref_count;
+       volatile gint ref_count;
 };
 
 struct _GDataFreebaseTopicResultPrivate {