include: reduce global includes in labwc.h

src/ssd/ssd-border.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 
 #include <assert.h>
+#include <wlr/types/wlr_scene.h>
 #include "common/scene-helpers.h"
 #include "labwc.h"
 #include "ssd-internal.h"

src/ssd/ssd-extents.c

@@ -2,6 +2,7 @@
 
 #include <assert.h>
 #include <pixman.h>
+#include <wlr/types/wlr_scene.h>
 #include "common/scene-helpers.h"
 #include "config/rcxml.h"
 #include "labwc.h"

src/ssd/ssd-shadow.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 
 #include <assert.h>
-#include "common/scene-helpers.h"
+#include <wlr/types/wlr_scene.h>
 #include "labwc.h"
 #include "buffer.h"
 #include "ssd-internal.h"

src/ssd/ssd.c

@@ -8,6 +8,7 @@
 
 #include <assert.h>
 #include <strings.h>
+#include <wlr/types/wlr_scene.h>
 #include "common/mem.h"
 #include "common/scene-helpers.h"
 #include "labwc.h"