Fix prototype chain contains helper h == NULL
Fix prototype chain contains helper h == NULL

markand/duktape,harold-b/duktape,svaarala/duktape,harold-b/duktape,svaarala/duktape,markand/duktape,harold-b/duktape,harold-b/duktape,svaarala/duktape,harold-b/duktape,svaarala/duktape,markand/duktape,harold-b/duktape,svaarala/duktape,markand/duktape,markand/duktape,harold-b/duktape,harold-b/duktape,harold-b/duktape,markand/duktape,markand/duktape,svaarala/duktape,markand/duktape,svaarala/duktape,svaarala/duktape,markand/duktape,markand/duktape,svaarala/duktape,harold-b/duktape