bug#9727: 24.0.90; Lazy highlighting in _word_ Isearch

[Dani Moncayo]

>From "emacs -Q":
1. Type "M-<" (to move point to the beginning of *scratch* buffer).
2. Type "C-s is" (to search for "is").
3. Type "M-s w" (to switch to word-type Isearch).
--> (Expected) Only the _word_ "is" gets lazy-highlighted.
--> (Observed) The lazy highlighting remains in each "is" (as before
step #3), regardless of whether it's a word by itself or not.


In GNU Emacs 24.0.90.1 (i386-mingw-nt5.1.2600)
 of 2011-10-01 on DANI-PC
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.5)'

-- 
Dani Moncayo