1) add check on existance of file to be flashed 2) enable compiler warnings in Makefile 3) fix compiler warning about htonl (etc.) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21538 a1c6a512-1295-4272-9138-f99709370657
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18545 a1c6a512-1295-4272-9138-f99709370657
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18544 a1c6a512-1295-4272-9138-f99709370657
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18360 a1c6a512-1295-4272-9138-f99709370657