Import code from previous AssetBuilder version

thirdparty/libtomcrypt/pk/dsa/dsa_free.c

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+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+   @file dsa_free.c
+   DSA implementation, free a DSA key, Tom St Denis
+*/
+
+#ifdef LTC_MDSA
+
+/**
+   Free a DSA key
+   @param key   The key to free from memory
+*/
+void dsa_free(dsa_key *key)
+{
+   LTC_ARGCHKVD(key != NULL);
+   mp_cleanup_multi(&key->y, &key->x, &key->q, &key->g, &key->p, NULL);
+   key->type = key->qord = 0;
+}
+
+#endif
+
+/* ref:         HEAD -> master, tag: v1.18.2 */
+/* git commit:  7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */