Replace secp256k1_ecmult_context_clear() with SECP256K1_CLEANSE()

Author: isle2983

src/ecmult.h

@@ -23,7 +23,6 @@ static void secp256k1_ecmult_context_build(secp256k1_ecmult_context *ctx, const
 static void secp256k1_ecmult_context_clone(secp256k1_ecmult_context *dst,
                                            const secp256k1_ecmult_context *src, const secp256k1_callback *cb);
 static void secp256k1_ecmult_context_teardown(secp256k1_ecmult_context *ctx);
-static void secp256k1_ecmult_context_clear(secp256k1_ecmult_context *ctx);
 static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context *ctx);
 
 /** Double multiply: R = na*A + ng*G */

src/ecmult_impl.h

@@ -224,10 +224,6 @@ static void secp256k1_ecmult_context_teardown(secp256k1_ecmult_context *ctx) {
 #endif
 }
 
-static void secp256k1_ecmult_context_clear(secp256k1_ecmult_context *ctx) {
-    secp256k1_ecmult_context_init(ctx);
-}
-
 /** Convert a number to WNAF notation. The number becomes represented by sum(2^i * wnaf[i], i=0..bits),
  *  with the following guarantees:
  *  - each wnaf[i] is either 0, or an odd integer between -(1<<(w-1) - 1) and (1<<(w-1) - 1)

src/secp256k1.c

@@ -92,7 +92,7 @@ secp256k1_context* secp256k1_context_clone(const secp256k1_context* ctx) {
 void secp256k1_context_destroy(secp256k1_context* ctx) {
     if (ctx != NULL) {
         secp256k1_ecmult_context_teardown(&ctx->ecmult_ctx);
-        secp256k1_ecmult_context_clear(&ctx->ecmult_ctx);
+        SECP256K1_CLEANSE(ctx->ecmult_ctx);
         secp256k1_ecmult_gen_context_clear(&ctx->ecmult_gen_ctx);
 
         free(ctx);