comctl32: Add missing break (Coverity)

[Marcus Meissner]

On Wed, Feb 23, 2011 at 08:24:46PM +0300, Nikolay Sivov wrote:
> >>>      }
> >>>+    break;
> >>>      case DL_CANCELDRAG:
> >>>          /* Clear drag arrow */
> >>>          DrawInsert(hwnd, hwndList, -1);
> >>Why? Looks to me it's fine to clear on dropped case too. Coverity is a
> >>bit paranoid about missed breaks.
> >A missing break is not trivial to detect; especially if something is
> >done in a specific case. That's why Wine has a ton of "/* fall through
> >*/" annotations. IMHO they should be added here too .
> Well, there's no third option basing on code - report all or report
> none, cause you can't figure out automatically is it ok to fall or
> not. A comment you mean is kind of suppression sign for checker?.
> Speaking about this particular case, I have a better comboex fix in
> mind, and for toolbar I think it's fine to add a comment.

lint used 

/* FALLTHROUGH */

as a tag. Not sure if Coverity uses it, but we could use somesuch for
tagging such places.

Ciao, Marcus