Import code from previous AssetBuilder version

thirdparty/libtommath/bn_mp_zero.c

@@ -0,0 +1,33 @@
+#include "tommath_private.h"
+#ifdef BN_MP_ZERO_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * SPDX-License-Identifier: Unlicense
+ */
+
+/* set to zero */
+void mp_zero(mp_int *a)
+{
+   int       n;
+   mp_digit *tmp;
+
+   a->sign = MP_ZPOS;
+   a->used = 0;
+
+   tmp = a->dp;
+   for (n = 0; n < a->alloc; n++) {
+      *tmp++ = 0;
+   }
+}
+#endif
+
+/* ref:         HEAD -> master, tag: v1.1.0 */
+/* git commit:  08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
+/* commit time: 2019-01-28 20:32:32 +0100 */