RT3917: add cleanup on an error path

Reviewed-by: Richard Levitte <levitte@openssl.org>

crypto/cms/cms_smime.c

diff --git a/crypto/cms/cms_smime.c b/crypto/cms/cms_smime.c
index 0d97d3e..b33bc1d 100644
--- a/crypto/cms/cms_smime.c
+++ b/crypto/cms/cms_smime.c
@@ -386,7 +386,7 @@
         tmpin = BIO_new_mem_buf(ptr, len);
         if (tmpin == NULL) {
             CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
-            return 0;
+            goto err2;
         }
     } else
         tmpin = dcont;
@@ -455,6 +455,7 @@
     if (out != tmpout)
         BIO_free_all(tmpout);
 
+ err2:
     sk_X509_pop_free(cms_certs, X509_free);
     sk_X509_CRL_pop_free(crls, X509_CRL_free);