windows: Avoid -Wint-conversion errors

Clang 15 made "incompatible pointer to integer conversion" an error
instead of a plain warning. This fixes errors like these:

system/keys-win.c:257:13: error: incompatible pointer to integer conversion initializing 'HCRYPTHASH' (aka 'unsigned long') with an expression of type 'void *' [-Wint-conversion]
        HCRYPTHASH hHash = NULL;
                   ^       ~~~~

Signed-off-by: Martin Storsjo <martin@martin.st>

diff --git a/lib/system/keys-win.c b/lib/system/keys-win.c
index 4463c3b2d7e62f59cd8addf3417acb0841075466..a0fffe249ede362e01a637bd9f98577f9852d7b2 100644 (file)
--- a/lib/system/keys-win.c
+++ b/lib/system/keys-win.c
@@ -254,7 +254,7 @@ int capi_sign(gnutls_privkey_t key, void *userdata,
 {
        priv_st *priv = (priv_st *) userdata;
        ALG_ID Algid;
-       HCRYPTHASH hHash = NULL;
+       HCRYPTHASH hHash = 0;
        uint8_t digest[MAX_HASH_SIZE];
        unsigned int digest_size;
        gnutls_digest_algorithm_t algo;
@@ -441,7 +441,7 @@ static
 int privkey_import_capi(gnutls_privkey_t pkey, const char *url, 
                priv_st *priv, CRYPT_KEY_PROV_INFO *kpi)
 {
-       HCRYPTPROV hCryptProv = NULL;
+       HCRYPTPROV hCryptProv = 0;
        int ret, enc_too = 0;
        DWORD i, dwErrCode = 0;
 
@@ -702,7 +702,7 @@ int privkey_import_ncrypt(gnutls_privkey_t pkey, const char *url,
                priv_st *priv, CRYPT_KEY_PROV_INFO *kpi, NCRYPT_PROV_HANDLE *sctx)
 {
        SECURITY_STATUS r;
-       NCRYPT_KEY_HANDLE nc = NULL;
+       NCRYPT_KEY_HANDLE nc = 0;
        int ret, enc_too = 0;
        WCHAR algo_str[64];
        DWORD algo_str_size = 0;
@@ -786,7 +786,7 @@ int _gnutls_privkey_import_system_url(gnutls_privkey_t pkey, const char *url)
        const CERT_CONTEXT *cert = NULL;
        CRYPT_HASH_BLOB blob;
        CRYPT_KEY_PROV_INFO *kpi = NULL;
-       NCRYPT_PROV_HANDLE sctx = NULL;
+       NCRYPT_PROV_HANDLE sctx = 0;
        DWORD kpi_size;
        SECURITY_STATUS r;
        int ret;