[mutter] keybindings: fix erratic raise_or_lower behavior

[Rui Matos <rtcm src gnome org>]

commit 9a123847e0e3be6197b8beea95370085954f5015
Author: Jose Marino <braket hotmail com>
Date:   Mon Feb 6 09:17:02 2017 -0700

    keybindings: fix erratic raise_or_lower behavior
    
    Function "handle_raise_or_lower (src/core/keybindings.c)" is called
    when running 'raise-or-lower' on a window. This function iterates
    through all the windows in the stack to determine if our window is
    already on top or obscured. The problem is that the window stack
    includes windows in another workspaces and also windows that are
    minimized.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=705200

 src/core/keybindings.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/core/keybindings.c b/src/core/keybindings.c
index b7853e2..19b48ee 100644
--- a/src/core/keybindings.c
+++ b/src/core/keybindings.c
@@ -3198,7 +3198,7 @@ handle_raise_or_lower (MetaDisplay     *display,
     {
       MetaRectangle tmp, win_rect, above_rect;
 
-      if (above->mapped)
+      if (above->mapped && meta_window_should_be_showing (above))
         {
           meta_window_get_frame_rect (window, &win_rect);
           meta_window_get_frame_rect (above, &above_rect);