KLineEdit regression in branch? tagging tomorrow!

[Jacopo De Simoi]

Dear Core-devs,
  it appears that KLineEdit has a regression in the 4.5, branch; automatic completion
appears broken since the completed text is shown in the default color whereas it should be gray 
(too bad imagebin.ca is down)

I can reproduce with Qt 4.7, but dfaure told me he could reproduce with Qt 4.6 as well. 
This is quite an issue, since it notably affects the "open file" window, as well as krunner. 

I could not find the commit responsible for the regression, hopefully someone can dig into it
before 4.5.2 is tagged, which is afair tomorrow.

Thanks
 __J