Make Buffered trackable since it connects to signals

diff --git a/source/io/buffered.h b/source/io/buffered.h
index 095be0f01625eaac5672278a7f20ae724268b227..bda2318ba5e7370205157f6242355c042f60c68d 100644 (file)
--- a/source/io/buffered.h
+++ b/source/io/buffered.h
@@ -1,12 +1,13 @@
 #ifndef MSP_IO_BUFFERED_H_
 #define MSP_IO_BUFFERED_H_
 
+#include <sigc++/trackable.h>
 #include "base.h"
 
 namespace Msp {
 namespace IO {
 
-class Buffered: public Base
+class Buffered: public Base, public sigc::trackable
 {
 private:
        Base &below;