newbie/foolish question: gdk-pixbuf and gtk

["Richard L" <rklaird hotmail com>]

I am trying to make part of a program that displays a jpg image.  My program 
compiles, but i get the following error when i exec it:

** CRITICAL **: file gdk-pixbuf-render.c: line 211
(gdk_pixbuf_render_to_drawable): assertion 'src_y >= 0 && src_y + height <=
apb->height' failed.

this error prints whenever the window needs to redraw, for example, when i
drag another window in front of my app.  besides this error, the drawing
area does not seem to show up, so i sincerely doubt that i am doing this
correctly.  please don't berate me for posting here; i know that this is a
newbie problem.  nevertheless, i would greatly appreciate help on this one
(maybe if i figure this out, you'll never hear from me again!).

to help you help me, here is the fubar source:

#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

//the widgets and stuff
GtkWidget *window;
GtkWidget *drawing_area;
GdkPixbuf *pixbuf;

gint exposure(GtkWidget *widget,GdkEventExpose *event)
        {
gdk_pixbuf_render_to_drawable(pixbuf,
  drawing_area->window,
  drawing_area->style->white_gc,
  0, 0,
  0, 0,
  200, 200,
  GDK_RGB_DITHER_NORMAL,
  0, 0);
return FALSE;
}
        int main(int argc, char *argv[])
{

//init gtk
  gtk_init(&argc, &argv);

//init gdkrgb
  gdk_rgb_init();

//make the window
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

//the window housekeeping
  gtk_window_set_title(GTK_WINDOW(window), "pixbuf?");
  gtk_widget_set_usize(window, 300, 300);

//connect the destroy handler
  gtk_signal_connect(GTK_OBJECT(window), "destroy",
    GTK_SIGNAL_FUNC(gtk_main_quit), NULL);

  /* ok, finished with the window */

//make the drawing area with the grkrgb visual and cmap things
  gtk_widget_push_visual(gdk_rgb_get_visual());
  gtk_widget_push_colormap(gdk_rgb_get_cmap());

  drawing_area = gtk_drawing_area_new();

  gtk_widget_pop_visual();
  gtk_widget_pop_colormap();

  gtk_drawing_area_size(GTK_DRAWING_AREA(drawing_area), 200, 200);

  gtk_container_add(GTK_CONTAINER(window), drawing_area);

gtk_widget_set_events(GTK_WIDGET(drawing_area),GDK_EXPOSURE_MASK);

gtk_signal_connect(GTK_OBJECT(drawing_area),"expose_event",GTK_SIGNAL_FUNC(exposure),NULL);

  gtk_widget_realize(drawing_area);

//the pixbuf

  pixbuf = gdk_pixbuf_new_from_file("file");

  gtk_object_get_data(GTK_OBJECT(drawing_area), "pixbuf");

//show it

  gtk_widget_show_all(window);

  gtk_main();
  return(0);
}

thanks again,
-rklaird

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