[PATCH] Don't go to edit mode if the dive notes field didn't change.

[Dirk Hohndel]

On Fri, Jan 30, 2015 at 11:01:06PM +0200, Gehad Elrobey wrote:
> I forgot to check for the empty value in the two conditions, patch
> re-attached.

Actually, we have our own beautiful same_string() function that does the
sane thing when comparing NULL and "" (they are the same). Let's use that
instead...
I'll update your patch, no need to resend.

/D