a possible bug of gtk_drag_set_default_icon()?

[KUSANO Takayuki <AE5T-KSN asahi-net or jp>]

My friend pointed me out that gtk_drag_set_default_icon() in
gtk+/gtk/gtkdnd.c has a bug. He said,

--- gtkdnd.c.orig	Sun Jun 11 21:28:53 2000
+++ gtkdnd.c	Sun Jun 11 21:29:04 2000
@@ -2056,7 +2056,7 @@
   if (default_icon_pixmap)
     gdk_pixmap_unref (default_icon_pixmap);
   if (default_icon_mask)
-    gdk_pixmap_unref (default_icon_pixmap);
+    gdk_pixmap_unref (default_icon_mask);
 
   default_icon_colormap = colormap;
   gdk_colormap_ref (colormap);

This can be applied to both gtk+1.2 and gtk+1.3.
Is this really a bug?

  KUSANO Takayuki <URL:http://www.asahi-net.or.jp/~AE5T-KSN/>