free NULL cleanup
Start ensuring all OpenSSL "free" routines allow NULL, and remove
any if check before calling them.
This gets DH_free, DSA_free, RSA_free
Reviewed-by: Matt Caswell <matt@openssl.org>
diff --git a/doc/crypto/DSA_new.pod b/doc/crypto/DSA_new.pod
index 48e9b82a..3a6d582 100644
--- a/doc/crypto/DSA_new.pod
+++ b/doc/crypto/DSA_new.pod
@@ -19,6 +19,7 @@
DSA_free() frees the B<DSA> structure and its components. The values are
erased before the memory is returned to the system.
+If B<dsa> is NULL nothing is done.
=head1 RETURN VALUES
