/*
 * call-seq:
 *   set_master_of(stream, play=true, stop=true, speed=true) -> boolean
 *
 * Sets the stream to be the master of given stream. The affection is given in a hash.
 * By default play, stop and speed operations are affected.
 */
static VALUE xs_set_master_of(int argc, VALUE *argv, VALUE self) {