if(!b) return;
void CRYPTO_mem_leaks_fp(FILE *fp)	{	BIO *b;	if (mh == NULL) return;	/* Need to turn off memory checking when allocated BIOs ... especially	 * as we're creating them at a time when we're trying to check we've not	 * left anything un-free()'d!! */	MemCheck_off();	if ((b=BIO_new(BIO_s_file())) == NULL)		return;	MemCheck_on();	BIO_set_fp(b,fp,BIO_NOCLOSE);	CRYPTO_mem_leaks(b);	BIO_free(b);	}