(twofish_selftest): Made non static.
(twofish_setup): Removed memory allocation. Instead, a
TWOFISH_pointer is given as an argument.
(twofish_encrypt, twofish_decrypt): Use correct pointer types. No
void * or casts.

Rev: src/symmetric/include/twofish.h:1.2
Rev: src/symmetric/twofish.c:1.2