Convert wl_pointer::axis to wl_fixed_t

To go with the matching protocol change.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>
diff --git a/src/compositor-wayland.c b/src/compositor-wayland.c
index 0615f95..4f763ff 100644
--- a/src/compositor-wayland.c
+++ b/src/compositor-wayland.c
@@ -559,12 +559,12 @@
 
 static void
 input_handle_axis(void *data, struct wl_pointer *pointer,
-		  uint32_t time, uint32_t axis, int32_t value)
+		  uint32_t time, uint32_t axis, wl_fixed_t value)
 {
 	struct wayland_input *input = data;
 	struct wayland_compositor *c = input->compositor;
 
-	notify_axis(&c->base.seat->seat, time, axis, wl_fixed_from_int(value));
+	notify_axis(&c->base.seat->seat, time, axis, value);
 }
 
 static const struct wl_pointer_listener pointer_listener = {