usercertinmem: fix memory leaks

/* Example using an in memory PEM user certificate and RSA key to retrieve an

 * https page.

 * Written by Ishan SinghLevett, based on Theo Borm's cacertinmem.c.

 * Note this example does not use a CA certificate, however one should be used

 * if you want a properly secure connection

 * Note that to maintain simplicity this example does not use a CA certificate 

 * for peer verification.  However, some form of peer verification

 * must be used in real circumstances when a secure connection is required.

 */

#include <openssl/ssl.h>

    printf("Use Key failed\n");

  }

  /* free resources that have been allocated by openssl functions */

  if (bio)

    BIO_free(bio);

  if (kbio)

    BIO_free(kbio);

  if (rsa)

    RSA_free(rsa);

  if (cert)

    X509_free(cert);

  /* all set to go */

  return CURLE_OK ;