Fix compilation of sendfirm with 0.3.x versions of libmtp and keep a (hacky) fallback for building with the older 0.2.x also fix a pair of 64 bit warnings

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19941 a1c6a512-1295-4272-9138-f99709370657
2 files changed