Fix another problem introduced by changes made when changing h2o_file_handler_t to use an H2O_VECTOR to hold the files list.
Fix another problem introduced by changes made when changing h2o_file_handler_t to use an H2O_VECTOR to hold the files list.

mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o