Remove warnings on Windows

src/lms.c

@@ -885,11 +885,11 @@ int lms_signature_to_merkle_root(const uint8_t I[16], size_t h, int q,
 	size_t i;
 
 	n = (size_t)1 << h;
-	if (q >= n) {
+	if (q < 0 || (size_t)q >= n) {
 		error_print();
 		return -1;
 	}
-	r = n + q;
+	r = n + (size_t)q;
 	PUTU32(rbytes, r);
 
 	lmots_signature_to_public_hash(I, q, y, dgst, root);

src/sdf/sdf.c

@@ -389,7 +389,6 @@ int sdf_generate_key(SDF_DEVICE *dev, SDF_KEY *key,
 	ECCrefPublicKey eccPublicKey;
 	ECCCipher eccCipher;
 	SM2_CIPHERTEXT ciphertext;
-	int ret;
 
 	if (!dev || !key || !sm2_key || !wrappedkey_len) {
 		error_print();
@@ -748,7 +747,6 @@ int sdf_export_encrypt_public_key(SDF_DEVICE *dev, int key_index, SM2_KEY *sm2_k
 int sdf_load_private_key(SDF_DEVICE *dev, SDF_PRIVATE_KEY *key, int key_index, const char *pass)
 {
 	void *hSession = NULL;
-	ECCrefPublicKey eccPublicKey;
 
 	if (!dev || !key || !pass) {
 		error_print();

src/secp256r1_key.c

@@ -95,9 +95,6 @@ int secp256r1_public_key_to_bytes(const SECP256R1_KEY *key, uint8_t **out, size_
 
 int secp256r1_public_key_from_bytes(SECP256R1_KEY *key, const uint8_t **in, size_t *inlen)
 {
-	secp256r1_t x;
-	secp256r1_t y;
-
 	if (!key || !in || !(*in) || !inlen) {
 		error_print();
 		return -1;

src/xmss.c

@@ -1878,7 +1878,7 @@ int xmssmt_build_auth_path(const xmss_hash256_t *tree, size_t height, size_t lay
 
 	for (i = 0; i < layers; i++) {
 		uint64_t local_index = index & (((uint64_t)1 << (height/layers)) - 1);
-		xmss_build_auth_path(tree, height/layers, local_index, auth_path);
+		xmss_build_auth_path(tree, height/layers, (uint32_t)local_index, auth_path);
 		auth_path += height/layers;
 		index >>= height/layers;
 		tree += xmss_num_tree_nodes(height/layers);