Function instr_set_raw_byte 

pub unsafe extern "C" fn instr_set_raw_byte(
    instr: *mut instr_t,
    pos: uint,
    byte: byte,
)

Assumes that \p instr’s raw bits are valid and allocated by \p instr and have > \p pos bytes. Sets instr’s raw byte at position \p pos (beginning with 0) to the value \p byte.