bug#5659: 23.1.92; bad toolbar icons, smaller default frame size

[Chong Yidong]

> emacs -Q
>
> See attached screenshot, which shows the pretest on the left and the last
> release, 23.1, on the right. As the screenshot shows:
>
> 1. The toolbar icons are without color.
> 2. The frame size has been reduced (fewer lines).

(1) is probably due to Lennart compiling without proper image library
support.  (2) is intentional, see Bug#3643.