#4 Fix atftp-0.7.1 buildroot/musl compile

[Peter Seiderer]

Two patches to fix buildroot/musl ([1], [2]) compile, see [3] for
details.

Regards,
Peter

[1] http://buildroot.uclibc.org/
[2] http://www.musl-libc.org/
[3] http://lists.busybox.net/pipermail/buildroot/2015-April/125453.html

[Martin Dummer]

merged, thanks for contributing!