Import code from previous AssetBuilder version

thirdparty/libtomcrypt/misc/crypt/crypt_argchk.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 crypt_argchk.c
+  Perform argument checking, Tom St Denis
+*/
+
+#if (ARGTYPE == 0)
+void crypt_argchk(const char *v, const char *s, int d)
+{
+ fprintf(stderr, "LTC_ARGCHK '%s' failure on line %d of file %s\n",
+         v, d, s);
+ abort();
+}
+#endif
+
+/* ref:         HEAD -> master, tag: v1.18.2 */
+/* git commit:  7e7eb695d581782f04b24dc444cbfde86af59853 */
+/* commit time: 2018-07-01 22:49:01 +0200 */