Log Message:
Update emacs-snapshot to 24.0.50.20100602.  Based on the patch provided
by Makoto Fujiwara in PR 43415.

Notable changes since 23.2:
	* Fix alloca definition when using gcc on non-gnu systems.
	* font.c (font_range): Return the range for the font found at first.
	* xdisp.c (init_iterator): Don't turn on bidi reordering in
	unibyte buffers.  See
	http://lists.gnu.org/archive/html/emacs-devel/2010-05/msg00263.html.