Auto merge of #116 - aleksander:master, r=mrmonday
Auto merge of #116 - aleksander:master, r=mrmonday

use libc::size_t instead of u64

This will fix compilation errors on 32bit non-windows platforms.

mrmonday/libpnet,little-dude/libpnet,libpnet/libpnet,mrmonday/libpnet,symphorien/libpnet,little-dude/libpnet,fsck/libpnet,symphorien/libpnet,little-dude/libpnet,symphorien/libpnet,symphorien/libpnet,mrmonday/libpnet,little-dude/libpnet,mrmonday/libpnet,fsck/libpnet,fsck/libpnet,libpnet/libpnet,libpnet/libpnet,fsck/libpnet,libpnet/libpnet