libweston: unexport weston_output_update_matrix()

Only used internally in core. Needs to happen automatically when
something changes, so there should no need to call it from outside.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Armin Krezović <krezovic.armin@gmail.com>

libweston/compositor.c

@@ -66,6 +66,9 @@
 
 #define DEFAULT_REPAINT_WINDOW 7 /* milliseconds */
 
+static void
+weston_output_update_matrix(struct weston_output *output);
+
 static void
 weston_output_transform_scale_init(struct weston_output *output,
 				   uint32_t transform, uint32_t scale);
@@ -4344,7 +4347,7 @@ weston_compositor_reflow_outputs(struct weston_compositor *compositor,
 	}
 }
 
-WL_EXPORT void
+static void
 weston_output_update_matrix(struct weston_output *output)
 {
 	float magnification;

libweston/compositor.h

@@ -1714,8 +1714,6 @@ void
 weston_output_activate_zoom(struct weston_output *output,
 			    struct weston_seat *seat);
 void
-weston_output_update_matrix(struct weston_output *output);
-void
 weston_output_move(struct weston_output *output, int x, int y);
 
 void