[mutter] xwayland: Raise the dnd window each time

[Olivier Fourdan <ofourdan src gnome org>]

commit 4b86af839f55b43a7931e741c21736cb1b953e75
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Thu Mar 9 14:06:51 2017 +0100

    xwayland: Raise the dnd window each time
    
    If the dnd window ends up lower in the overall stack than the window
    it's supposed to fence, the drop might end up in some other window
    underneath the expected target window.
    
    Maps and raises the dnd window each time it's shown so that it's always
    placed above.
    
    Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=779800

 src/wayland/meta-xwayland-selection.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/wayland/meta-xwayland-selection.c b/src/wayland/meta-xwayland-selection.c
index 59aac32..a78e846 100644
--- a/src/wayland/meta-xwayland-selection.c
+++ b/src/wayland/meta-xwayland-selection.c
@@ -1368,7 +1368,7 @@ repick_drop_surface (MetaWaylandCompositor *compositor,
   if (focus &&
       focus->window->client_type == META_WINDOW_CLIENT_TYPE_WAYLAND)
     {
-      XMapWindow (xdisplay, dnd->dnd_window);
+      XMapRaised (xdisplay, dnd->dnd_window);
       XMoveResizeWindow (xdisplay, dnd->dnd_window,
                          focus->window->rect.x,
                          focus->window->rect.y,