Fix an int/string type confusion in the web interface.
Fix an int/string type confusion in the web interface.

lekkas/livegrep,paulproteus/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,wfxiang08/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep