Try to fix compile warning on OS X.

diff --git a/src/object.h b/src/object.h
index 8364efff8efb26b5fe8504ce0da8e1d56d786fba..508170510fc133055f7ee8761bf09ffaf26b7b38 100644 (file)
--- a/src/object.h
+++ b/src/object.h
@@ -64,10 +64,10 @@ public:
        }
 
 protected:
-       friend class ::write_interop_subtitle_test;
-       friend class ::write_interop_subtitle_test2;
-       friend class ::write_smpte_subtitle_test;
-       friend class ::write_smpte_subtitle_test2;
+       friend struct ::write_interop_subtitle_test;
+       friend struct ::write_interop_subtitle_test2;
+       friend struct ::write_smpte_subtitle_test;
+       friend struct ::write_smpte_subtitle_test2;
 
        /** ID */
        std::string _id;