Fix wayland display context field name.

Fixed upstream.

Change-Id: I856ac3816b712a13adb39c86dd3e82dce997df55
diff --git a/gst-libs/gst/wayland/wayland.c b/gst-libs/gst/wayland/wayland.c
index 6e7fefa..0c85cfd 100644
--- a/gst-libs/gst/wayland/wayland.c
+++ b/gst-libs/gst/wayland/wayland.c
@@ -46,7 +46,7 @@
   GstContext *context =
       gst_context_new (GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE, TRUE);
   gst_structure_set (gst_context_writable_structure (context),
-      "handle", G_TYPE_POINTER, display, NULL);
+      "display", G_TYPE_POINTER, display, NULL);
   return context;
 }
 
@@ -59,7 +59,7 @@
   g_return_val_if_fail (GST_IS_CONTEXT (context), NULL);
 
   s = gst_context_get_structure (context);
-  gst_structure_get (s, "handle", G_TYPE_POINTER, &display, NULL);
+  gst_structure_get (s, "display", G_TYPE_POINTER, &display, NULL);
   return display;
 }