Repair charging screen on archos. usb_detect() doesn't return a boolean since 2007-09-04. Fixed same problem in the m:robe 500 bootloader and in bootbox.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17955 a1c6a512-1295-4272-9138-f99709370657
3 files changed