Fix RETCONSTN assert when refcounting disabled
Fix RETCONSTN assert when refcounting disabled

svaarala/duktape,svaarala/duktape,svaarala/duktape,markand/duktape,markand/duktape,markand/duktape,markand/duktape,svaarala/duktape,markand/duktape,svaarala/duktape,svaarala/duktape,svaarala/duktape,svaarala/duktape,markand/duktape,markand/duktape,markand/duktape,svaarala/duktape,markand/duktape,markand/duktape