removed unnecessary dereferencing

pd/src/m_binbuf.c

@@ -62,7 +62,6 @@ void binbuf_free(t_binbuf *x)
 {
     t_freebytes(x->b_vec, x->b_n * sizeof(*x->b_vec));
     t_freebytes(x,  sizeof(*x));
-	x = NULL;
 }
 
 t_binbuf *binbuf_duplicate(t_binbuf *y)

pd/src/m_pd.c

@@ -49,7 +49,6 @@ void pd_free(t_pd *x)
             binbuf_free(((t_object *)x)->ob_binbuf);
     }
     if (c->c_size) t_freebytes(x, c->c_size);
-	x = NULL;
 }
 
 void gobj_save(t_gobj *x, t_binbuf *b)