Casts and type changes to fix portability issues.
- int -> size_t
- adjust width of RHS of shift
- adjust widths of types

branches: 1.2.6;
ansify function definitions

branches: 1.1.36;
Merge libkern + libc common files. As requested by core.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head