[PATCH weston v3 06/17] compositor: constify weston_surface_build_buffer_matrix()

[Pekka Paalanen]

From: Pekka Paalanen <pekka.paalanen at collabora.co.uk>

Makes it easier to see that it does not change weston_surface state
implicitly.

Signed-off-by: Pekka Paalanen <pekka.paalanen at collabora.co.uk>
---
 src/compositor.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compositor.c b/src/compositor.c
index 5500197..491b333 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -2708,10 +2708,10 @@ weston_surface_commit_subsurface_order(struct weston_surface *surface)
 }
 
 static void
-weston_surface_build_buffer_matrix(struct weston_surface *surface,
+weston_surface_build_buffer_matrix(const struct weston_surface *surface,
 				   struct weston_matrix *matrix)
 {
-	struct weston_buffer_viewport *vp = &surface->buffer_viewport;
+	const struct weston_buffer_viewport *vp = &surface->buffer_viewport;
 	double src_width, src_height, dest_width, dest_height;
 
 	weston_matrix_init(matrix);
-- 
2.7.3