2010-05-28  Colin Watson  <cjwatson@ubuntu.com>

	Make grub-probe work with symbolic links under /dev/mapper as well
	as with real block devices.  The Linux world seems to be (at best)
	in transition here, and GRUB shouldn't get caught in the middle.

	* kern/emu/getroot.c (find_root_device): Follow symbolic links under
	/dev/mapper.