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-fbdev.c b/src/compositor-fbdev.c
index 8cffb6c..f7782d8 100644
--- a/src/compositor-fbdev.c
+++ b/src/compositor-fbdev.c
@@ -724,7 +724,7 @@
 		/* If we have a repaint scheduled (from the idle handler), make
 		 * sure we cancel that so we don't try to pageflip when we're
 		 * vt switched away.  The OFFSCREEN state will prevent
-		 * further attemps at repainting.  When we switch
+		 * further attempts at repainting.  When we switch
 		 * back, we schedule a repaint, which will process
 		 * pending frame callbacks. */