remove unnecessary cast in cybuf

shared/signal/cybuf.c

@@ -287,7 +287,7 @@ void *cybuf_init(t_class *owner, t_symbol *bufname, int numchans, int singlemode
     c->c_single = singlemode;
     c->c_owner = owner;
     c->c_npts = 0;
-    c->c_vectors = (t_word**)vectors;
+    c->c_vectors = vectors;
     c->c_channames = channames;
     c->c_disabled = 0;
     c->c_playable = 0;