winex11.drv: change bpp fixme to a warn (try 2)

[Austin English]

Last try had an extraneous change.

-- 
-Austin
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: bpp.txt
Url: http://www.winehq.org/pipermail/wine-patches/attachments/20081128/d8db0d82/attachment.txt