compositor: Fix a couple comment typos

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/src/compositor.h b/src/compositor.h
index a427088..2848674 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -564,10 +564,10 @@
 };
 
 enum {
-	WESTON_COMPOSITOR_ACTIVE,
+	WESTON_COMPOSITOR_ACTIVE,	/* normal rendering and events */
 	WESTON_COMPOSITOR_IDLE,		/* shell->unlock called on activity */
 	WESTON_COMPOSITOR_OFFSCREEN,	/* no rendering, no frame events */
-	WESTON_COMPOSITOR_SLEEPING	/* same as offscreen, but also set dmps
+	WESTON_COMPOSITOR_SLEEPING	/* same as offscreen, but also set dpms
                                          * to off */
 };