Make rdtable/rwtable size parameter behaves like the @ primitive

[sletz]

import("stdfaust.lib");
S = max(1, min(192000, ma.SR));
//S = 192000;
process = rwtable(S, .0, ba.period(S), os.osc(1000), ba.period(S));

gives: ERROR : checkInt failed for type RKIVN [1.000000, 192000.000000]

It would be interesting to allow S be bounded [min:max] signal, like the @ primitive.