[gcompris] Shapegames could crash if one tried to move an object while the bonus-object

[Bruno Coudoin <bcoudoin src gnome org>]

commit c2532a22ab13b670ecf04dff570c22f4eb165164
Author: Wolfram Sang <wolfram iswi org>
Date:   Fri Jun 19 00:17:50 2009 +0200

    Shapegames could crash if one tried to move an object while the bonus-object
    (e.g. sad flower) was still shown. Fix this by ensuring that the object to move
    or drop is the same one that got dragged.

 src/boards/shapegame.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/src/boards/shapegame.c b/src/boards/shapegame.c
index 41d394b..6267a7f 100644
--- a/src/boards/shapegame.c
+++ b/src/boards/shapegame.c
@@ -927,6 +927,7 @@ void target_point_hide()
 static gint item_event_drag(GnomeCanvasItem *item, GdkEvent *event, gpointer data)
 {
     static GnomeCanvasItem *shadow_item=NULL;
+    static GnomeCanvasItem *dragged;
     double item_x, item_y;
     Shape *shape, *found_shape;
 
@@ -1005,11 +1006,15 @@ static gint item_event_drag(GnomeCanvasItem *item, GdkEvent *event, gpointer dat
                 gdk_pixbuf_unref(dest);
                 gdk_pixbuf_unref(pixmap);
             }
+	    dragged = shape->item;
             gnome_canvas_item_reparent(shape->item, GNOME_CANVAS_GROUP(shape_list_root_item->parent));
             gnome_canvas_item_raise_to_top(shape->item);
             gc_drag_item_move(event);
             break;
         case GDK_MOTION_NOTIFY:
+	    if (item != dragged)
+		break;
+
             gc_drag_item_move(event);
 
             item_x = event->button.x;
@@ -1034,6 +1039,9 @@ static gint item_event_drag(GnomeCanvasItem *item, GdkEvent *event, gpointer dat
             target_point_switch_on(found_shape);
             break;
         case GDK_BUTTON_RELEASE:
+	    if (item != dragged)
+		break;
+
             item_x = event->button.x;
             item_y = event->button.y;
             gnome_canvas_item_w2i(item->parent, &item_x, &item_y);