[gtk/fix-corner-resize] Fix resize corners

[Matthias Clasen <matthiasc src gnome org>]

commit dc68d04c32b3334c5036a1874625bdb24105e557
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 2 19:08:02 2019 -0500

    Fix resize corners
    
    I was stuck in an X session and noticed that my resize corners
    all got east or north cursors. It turns out that gnome-shell
    does not properly advertise support for edge constraints under X11,
    and the absence of that makes the code for determining the edge
    under the cursor misbehave.
    
    This change should fix that.

 gtk/gtkwindow.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 339b0e6f89..1752293c46 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -1774,8 +1774,7 @@ edge_under_coordinates (GtkWindow     *window,
           edge != GDK_SURFACE_EDGE_SOUTH)
         return FALSE;
 
-      if (supports_edge_constraints &&
-          (edge == GDK_SURFACE_EDGE_NORTH ||
+      if ((edge == GDK_SURFACE_EDGE_NORTH ||
            edge == GDK_SURFACE_EDGE_SOUTH) &&
           (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_WEST)))
         return FALSE;
@@ -1789,8 +1788,7 @@ edge_under_coordinates (GtkWindow     *window,
           edge != GDK_SURFACE_EDGE_SOUTH)
         return FALSE;
 
-      if (supports_edge_constraints &&
-          (edge == GDK_SURFACE_EDGE_NORTH ||
+      if ((edge == GDK_SURFACE_EDGE_NORTH ||
            edge == GDK_SURFACE_EDGE_SOUTH) &&
           (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_EAST)))
         return FALSE;
@@ -1809,8 +1807,7 @@ edge_under_coordinates (GtkWindow     *window,
           edge != GDK_SURFACE_EDGE_WEST)
         return FALSE;
 
-      if (supports_edge_constraints &&
-          (edge == GDK_SURFACE_EDGE_EAST ||
+      if ((edge == GDK_SURFACE_EDGE_EAST ||
            edge == GDK_SURFACE_EDGE_WEST) &&
           (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_NORTH)))
         return FALSE;
@@ -1824,8 +1821,7 @@ edge_under_coordinates (GtkWindow     *window,
           edge != GDK_SURFACE_EDGE_WEST)
         return FALSE;
 
-      if (supports_edge_constraints &&
-          (edge == GDK_SURFACE_EDGE_EAST ||
+      if ((edge == GDK_SURFACE_EDGE_EAST ||
            edge == GDK_SURFACE_EDGE_WEST) &&
           (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_SOUTH)))
         return FALSE;