[gnome-builder] xml-pack: ref counts should be volatile

[Christian Hergert <chergert src gnome org>]

commit 645531770e883f7b03838a9c959b44eaceef210d
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jan 12 19:10:04 2018 -0800

    xml-pack: ref counts should be volatile

 src/plugins/xml-pack/ide-xml-schema-cache-entry.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/xml-pack/ide-xml-schema-cache-entry.h 
b/src/plugins/xml-pack/ide-xml-schema-cache-entry.h
index 76caa2cff..0d98d9ac3 100644
--- a/src/plugins/xml-pack/ide-xml-schema-cache-entry.h
+++ b/src/plugins/xml-pack/ide-xml-schema-cache-entry.h
@@ -49,7 +49,7 @@ typedef enum
 
 struct _IdeXmlSchemaCacheEntry
 {
-  guint ref_count;
+  volatile gint      ref_count;
 
   GFile             *file;
   GBytes            *content;