[LyX/master] Add comment.

[Richard Heck]

commit f5a7aebdfa891baaae7c15affae3006b642ae90c
Author: Richard Heck <rgh...@lyx.org>
Date:   Wed Mar 5 18:06:30 2014 -0500

    Add comment.

diff --git a/src/insets/InsetLabel.cpp b/src/insets/InsetLabel.cpp
index be8a516..4fbc95d 100644
--- a/src/insets/InsetLabel.cpp
+++ b/src/insets/InsetLabel.cpp
@@ -218,6 +218,8 @@ void InsetLabel::doDispatch(Cursor & cur, FuncRequest & cmd)
        switch (cmd.action()) {
 
        case LFUN_INSET_MODIFY: {
+               // the only other option here is "changetype", and we
+               // do not have different types.
                if (cmd.getArg(0) != "label") {
                        cur.undispatched();
                        return;