free NULL cleanup 7

This gets BN_.*free:
    BN_BLINDING_free BN_CTX_free BN_FLG_FREE BN_GENCB_free
    BN_MONT_CTX_free BN_RECP_CTX_free BN_clear_free BN_free BUF_MEM_free

Also fix a call to DSA_SIG_free to ccgost engine and remove some #ifdef'd
dead code in engines/e_ubsec.

Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/apps/dsaparam.c b/apps/dsaparam.c
index afc8a82..62d5fe7 100644
--- a/apps/dsaparam.c
+++ b/apps/dsaparam.c
@@ -328,8 +328,7 @@
         app_RAND_write_file(NULL);
     ret = 0;
  end:
-    if (cb != NULL)
-        BN_GENCB_free(cb);
+    BN_GENCB_free(cb);
     BIO_free(in);
     BIO_free_all(out);
     DSA_free(dsa);