message: Correct adios2_init_config_serial
  Closes
diff: @@ -72,7 +72,7 @@ adios2_adios *adios2_init_serial()
  adios2_adios *adios2_init_config_serial(const char *config_file)
  {
  - return adios2_init_config_glue_serial("", adios2_debug_mode_off, "C");
  + return adios2_init_config_glue_serial(config_file, adios2_debug_mode_off, "C");
  }
  adios2_io *adios2_declare_io(adios2_adios *adios, const char *name)
  