Fix typo in comment.

diff --git a/src/frame.h b/src/frame.h
index 9f6f2506572473e78552b7333842e541c867535e..364d8ffdf9506a6422f5f11feb70dfe733f1e616 100644 (file)
--- a/src/frame.h
+++ b/src/frame.h
@@ -178,7 +178,7 @@ struct frame
      These should probably be considered read-only by everyone except
      FRAME_SAMPLE_VISIBILITY.
 
-     This two are mutually exclusive.  They might both be zero, if the
+     These two are mutually exclusive.  They might both be zero, if the
      frame has been made invisible without an icon.  */
   char visible, iconified;