What am I doing wrong?

[Count Zero <countzero cyberdeck org>]

Ok, thanks to Havok for his help with gtk_pixmap_get()

Here is my full problem:

First, some code:

struct pixmap_info {
	GtkWidget *pixmap;
	gchar *filename;
};

void reload_pixmap (struct pixmap_info *pixmap, gint data) {
	GdkColormap *colormap;
	GdkPixmap *gdkpixmap;
	GdkBitmap *mask;
	gchar *checked_filename;
	
	colormap = gtk_widget_get_colormap (pixmap->pixmap);

	/* does filename exist? */
	checked_filename = check_file_exists(prefs.pixmapdir,
pixmap->filename);
	if (!checked_filename) {
		g_warning ("Pixmap file %s does not exist", pixmap->filename);
		gdkpixmap = gdk_pixmap_colormap_create_from_xpm_d (NULL,
colormap, &mask, NULL, dummy_pixmap_xpm);
	} else {		
		gdkpixmap = gdk_pixmap_colormap_create_from_xpm (NULL,
colormap, &mask, NULL, checked_filename);
		if (gdkpixmap == NULL) {
			g_warning ("Error loading pixmap file: %s",
checked_filename);
			gdkpixmap = gdk_pixmap_colormap_create_from_xpm_d
(NULL, colormap, &mask, NULL, dummy_pixmap_xpm);
		}
	}
	gtk_pixmap_set ((GtkPixmap*)pixmap->pixmap, gdkpixmap, mask);
	gdk_pixmap_unref (gdkpixmap);
	gdk_bitmap_unref (mask);
	g_free(checked_filename);

	return;
}

Ok, this works great, I use it in conjunction with a GSList of pixmap_info
structures, and when a user switches themes I use g_slist_foreach() to call
reload_pixmap.	Everything goes as planned, except that my memory usage seems
to creep up steadily (every time I switch themes, top shows a few more bytes
used by my program.)  So I am thinking I have a memory leak here.  I figured at
first that since I wasn't unref'ing the OLD gdkpixmap and mask that this was
the source of my memory leak, so I used gtk_pixmap_get() (thanks Havok) to pull
in the old gdkpixmap and mask, and then unref'ed them (to destroy them)  But of
course I get
Gdk-CRITICAL **: file gdkpixmap.c: line 823 (gdk_pixmap_unref): assertion
`private->ref_count > 0' failed.
When I try that, showing me that gtk_pixmap_set() must automagically unref the
old gdkpixmap and mask.

So, what am I missing? or is the fact that a top shows a few bytes of increased
memory usage NOT an indication of a memory leak?

Please let me know if you need more info to help with this problem, or feel
free to point out that I am in idiot who should learn more about C before
attempting this kind of program (just not on the list please)  Either way, any
comments (constructive prefered) are welcomed...

-Count Zero