bytecomp/byte-opt change breaks bootstrapping

[Juanma Barranquero]

Something in this change breaks bootstrapping:

2007-08-23  Stefan Monnier  <address@hidden>

        * emacs-lisp/bytecomp.el (byte-compile-output-docform)
        (byte-compile-output-as-comment): Use with-current-buffer rather than
        a weird set-buffer&prog1 combination.

        * emacs-lisp/byte-opt.el (byte-optimize-if): Move `progn' out
of the test
        so as to optimise cases where the `progn's result is constant.

             Juanma