Import code from previous AssetBuilder version

thirdparty/libtomcrypt/pk/katja/katja_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 katja_free.c
+  Free an Katja key, Tom St Denis
+*/
+
+#ifdef LTC_MKAT
+
+/**
+  Free an Katja key from memory
+  @param key   The RSA key to free
+*/
+void katja_free(katja_key *key)
+{
+   LTC_ARGCHK(key != NULL);
+   mp_clear_multi( key->d,  key->N,  key->dQ,  key->dP,
+                   key->qP,  key->p,  key->q, key->pq, NULL);
+}
+
+#endif
+
+/* ref:         HEAD -> master, tag: v1.18.2 */
+/* git commit:  7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */