#18 tixGrid set $x $y -style $s won't change cell background

[Dave Hubbell]

If you've created a tixDisplayStyle with the background
set like this:

set ds [ tixDisplayStyle text -background "tan" ]

and then you try to use that display style to change
the background color of an individual cell in a tixGrid
like this:

$gridWidget set $col $row -itemtype text -text $token
-style $ds

the background color of the display style will have no
effect.

I have a fix for this bug. I added the
TIX_DITEM_NORMAL_BG flag to two calls to Tix_DItemDisplay.

[Dave Hubbell]

fix for bug