mruby-string-ext/string.c: use the reference from mrb structure.
@@ -1266,7 +1266,7 @@ mrb_mruby_string_ext_gem_init(mrb_state* mrb)
mrb_define_method(mrb, s, "__lines", mrb_str_lines, MRB_ARGS_NONE());
- mrb_define_method(mrb, mrb_class_get(mrb, "Integer"), "chr", mrb_int_chr, MRB_ARGS_OPT(1));
+ mrb_define_method(mrb, mrb->integer_class, "chr", mrb_int_chr, MRB_ARGS_OPT(1));
}
void
