Parser in response mode does not reset on finish #128

#include <stdio.h>
#include <string.h>
#include "llhttp.h"

int handle_on_headers_complete(llhttp_t *parser) {
  printf("  headers complete\n");

  return 0;
}

int handle_on_message_begin(llhttp_t *parser) {
  printf("  message begin\n");

  return 0;
}

int handle_on_message_complete(llhttp_t *parser) {
  printf("  message complete\n");

  return 0;
}

int main (void) {
  llhttp_t parser;
  llhttp_settings_t settings;

  llhttp_settings_init(&settings);

  settings.on_headers_complete = handle_on_headers_complete;
  settings.on_message_begin = handle_on_message_begin;
  settings.on_message_complete = handle_on_message_complete;

  llhttp_init(&parser, HTTP_RESPONSE, &settings);

  const char* data = "HTTP/1.1 200 OK\r\n\r\n";
  int data_len = strlen(data);
  enum llhttp_errno err;
  int i = 0;

  while (i < 3) {
    printf("parsing\n");

    err = llhttp_execute(&parser, data, data_len);

    if (err == HPE_OK) {
      // all good
    } else {
      fprintf(stderr, "  ! %s %s\n", llhttp_errno_name(err), parser.reason);
    }

    llhttp_finish(&parser);

    i++;
  }
}