Correct type of pointer slot of g-object: release will set it to NIL

diff --git a/glib/gobject.object.high.lisp b/glib/gobject.object.high.lisp
index 80399b8..f1cca2e 100644 (file)
--- a/glib/gobject.object.high.lisp
+++ b/glib/gobject.object.high.lisp
@@ -2,7 +2,7 @@
 
 (defclass g-object ()
   ((pointer
-    :type cffi:foreign-pointer
+    :type (or null cffi:foreign-pointer)
     :initarg :pointer
     :accessor pointer
     :initform nil)