#79 Cannot re-enable captions

[gbm]

Due to the way that the data is handled in
modify_gallery.php, it is impossible to re-enable captions
on a gallery you have disabled them on.
When you are doing 'Modify Gallery Info', I think it skips
data fields you don't fill in (e.g. photo directory), except
for Title, Description and Author.
But because a checkbox has no value when off, if you
set it off it is being ignored.
Easiest way I thought of to fix it:
modify_gallery.php line 140 or so (just under
'error(_y("Title, author and description are required!"));' ):
if (!isset($no_comments) OR ($nocomments=="")){
$no_comments = "off";
}
This also has the advantage that in the list function that
tells you what changed on the next page, it says:
'no_comments => off'

Also a typo in view_func.php line 88, should be 'Add your
comment!' not 'Add yout comment!'