Update Bitcoin for libsecp256k1 API change

src/key.cpp

@@ -82,7 +82,7 @@ bool CKey::Sign(const uint256 &hash, std::vector<unsigned char>& vchSig, uint32_
         prng.Generate((unsigned char*)&nonce, 32);
         nonce += test_case;
         int nSigLen = 72;
-        int ret = secp256k1_ecdsa_sign((const unsigned char*)&hash, 32, (unsigned char*)&vchSig[0], &nSigLen, begin(), (unsigned char*)&nonce);
+        int ret = secp256k1_ecdsa_sign((const unsigned char*)&hash, (unsigned char*)&vchSig[0], &nSigLen, begin(), (unsigned char*)&nonce);
         nonce = 0;
         if (ret) {
             vchSig.resize(nSigLen);
@@ -114,7 +114,7 @@ bool CKey::SignCompact(const uint256 &hash, std::vector<unsigned char>& vchSig)
     do {
         uint256 nonce;
         prng.Generate((unsigned char*)&nonce, 32);
-        int ret = secp256k1_ecdsa_sign_compact((const unsigned char*)&hash, 32, &vchSig[1], begin(), (unsigned char*)&nonce, &rec);
+        int ret = secp256k1_ecdsa_sign_compact((const unsigned char*)&hash, &vchSig[1], begin(), (unsigned char*)&nonce, &rec);
         nonce = 0;
         if (ret)
             break;

src/pubkey.cpp

@@ -16,7 +16,7 @@ bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchS
     if (!IsValid())
         return false;
 #ifdef USE_SECP256K1
-    if (secp256k1_ecdsa_verify((const unsigned char*)&hash, 32, &vchSig[0], vchSig.size(), begin(), size()) != 1)
+    if (secp256k1_ecdsa_verify((const unsigned char*)&hash, &vchSig[0], vchSig.size(), begin(), size()) != 1)
         return false;
 #else
     CECKey key;
@@ -35,7 +35,7 @@ bool CPubKey::RecoverCompact(const uint256 &hash, const std::vector<unsigned cha
     bool fComp = ((vchSig[0] - 27) & 4) != 0;
 #ifdef USE_SECP256K1
     int pubkeylen = 65;
-    if (!secp256k1_ecdsa_recover_compact((const unsigned char*)&hash, 32, &vchSig[1], (unsigned char*)begin(), &pubkeylen, fComp, recid))
+    if (!secp256k1_ecdsa_recover_compact((const unsigned char*)&hash, &vchSig[1], (unsigned char*)begin(), &pubkeylen, fComp, recid))
         return false;
     assert((int)size() == pubkeylen);
 #else