[AD] Animation method dialog in demo cannot be cancelled with return key

[Grzegorz Adam Hankiewicz <gradha@xxxxxxxxxx>]

In the demo if you select the cancel button with the keys in the
animation method dialog and press return, the game keeps going,
because return is assigned as a shortcut key to the ok button.
The following patch corrects this behaviour. However, the same
problem exists for the vsync checkbox, so at this point I leave it
to the GUI gurus, because the changes don't seem very contained.

Index: src/gui.c
===================================================================
RCS file: /cvsroot/alleg/allegro/src/gui.c,v
retrieving revision 1.81
diff -u -p -r1.81 gui.c
--- src/gui.c   21 Aug 2005 16:23:28 -0000      1.81
+++ src/gui.c   15 Oct 2005 20:57:57 -0000
@@ -1266,11 +1266,11 @@ int update_dialog(DIALOG_PLAYER *player)
       /* let object deal with the key */
       if (player->focus_obj >= 0) {
         MESSAGE(player->focus_obj, MSG_CHAR, ccombo);
-        if (player->res & D_USED_CHAR)
+        if (player->res & (D_USED_CHAR | D_CLOSE))
            goto getout;
 
         MESSAGE(player->focus_obj, MSG_UCHAR, cascii);
-        if (player->res & D_USED_CHAR)
+        if (player->res & (D_USED_CHAR | D_CLOSE))
            goto getout;
       }
 
Index: src/guiproc.c
===================================================================
RCS file: /cvsroot/alleg/allegro/src/guiproc.c,v
retrieving revision 1.31
diff -u -p -r1.31 guiproc.c
--- src/guiproc.c       14 Sep 2005 11:19:42 -0000      1.31
+++ src/guiproc.c       15 Oct 2005 20:57:58 -0000
@@ -352,6 +352,11 @@ int d_button_proc(int msg, DIALOG *d, in
       case MSG_WANTFOCUS:
         return D_WANTFOCUS;
 
+      case MSG_CHAR:
+        /* Accept return key to close dalogs. */
+        if ((c & 0xFF) != 13)
+           return D_O_K;
+            
       case MSG_KEY:
         /* close dialog? */
         if (d->flags & D_EXIT) {