Change repaint_needed to bool

It is only used as a binary value.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/libweston/compositor.c b/libweston/compositor.c
index 4962618..80268bc 100644
--- a/libweston/compositor.c
+++ b/libweston/compositor.c
@@ -2310,7 +2310,7 @@
 
 	pixman_region32_fini(&output_damage);
 
-	output->repaint_needed = 0;
+	output->repaint_needed = false;
 
 	weston_compositor_repick(ec);
 
@@ -2549,7 +2549,7 @@
 		TL_POINT("core_repaint_req", TLP_OUTPUT(output), TLP_END);
 
 	loop = wl_display_get_event_loop(compositor->wl_display);
-	output->repaint_needed = 1;
+	output->repaint_needed = true;
 	if (output->repaint_scheduled)
 		return;