From f491cd35df2ee62ed55a82ba70dc280f50984213 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Tue, 30 Apr 2013 15:57:40 +0200
Subject: [PATCH] Make constants constant

---
 src/group.h       | 2 +-
 src/impl/ecmult.h | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/group.h b/src/group.h
index cc6cc17..7dd9a9d 100644
--- a/src/group.h
+++ b/src/group.h
@@ -29,7 +29,7 @@ typedef struct {
     secp256k1_num_t lambda, a1b2, b1, a2;
 } secp256k1_ge_consts_t;
 
-static secp256k1_ge_consts_t *secp256k1_ge_consts = NULL;
+static const secp256k1_ge_consts_t *secp256k1_ge_consts = NULL;
 
 /** Initialize the group module. */
 void static secp256k1_ge_start(void);
diff --git a/src/impl/ecmult.h b/src/impl/ecmult.h
index 0261a27..0828488 100644
--- a/src/impl/ecmult.h
+++ b/src/impl/ecmult.h
@@ -66,7 +66,7 @@ typedef struct {
     secp256k1_ge_t fin; // -(sum(prec[j][0], j=0..63))
 } secp256k1_ecmult_consts_t;
 
-static secp256k1_ecmult_consts_t *secp256k1_ecmult_consts = NULL;
+static const secp256k1_ecmult_consts_t *secp256k1_ecmult_consts = NULL;
 
 static void secp256k1_ecmult_start(void) {
     if (secp256k1_ecmult_consts != NULL)
@@ -109,7 +109,8 @@ static void secp256k1_ecmult_stop(void) {
     if (secp256k1_ecmult_consts == NULL)
         return;
 
-    free(secp256k1_ecmult_consts);
+    secp256k1_ecmult_consts_t *c = (secp256k1_ecmult_consts_t*)secp256k1_ecmult_consts;
+    free(c);
     secp256k1_ecmult_consts = NULL;
 }