Split up ecmult and ecmult_gen entirely

src/ecmult_gen.h

@@ -0,0 +1,17 @@
+// Copyright (c) 2013-2014 Pieter Wuille
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef _SECP256K1_ECMULT_GEN_
+#define _SECP256K1_ECMULT_GEN_
+
+#include "num.h"
+#include "group.h"
+
+static void secp256k1_ecmult_gen_start(void);
+static void secp256k1_ecmult_gen_stop(void);
+
+/** Multiply with the generator: R = a*G */
+static void secp256k1_ecmult_gen(secp256k1_gej_t *r, const secp256k1_num_t *a);
+
+#endif