bug#18196: 24.4.50; crash when setting face background in terminal frame

[martin rudalics]

> Everything looks good. Your patch still applies fine and fixes the face
> background crash, and your commit fixes the terminal emacsclient display
> issue.

I checked that in now as revision#117679 on trunk.  Please check whether
everything works as expected.  And thanks again for your invaluable help
in debugging this.

martin