Add context to crypto backend init (so it can print errors to callback).

git-svn-id: https://cryptsetup.googlecode.com/svn/trunk@415 36d66b0a-2a48-0410-832c-cd162a569da5

lib/crypto_backend/crypto_nss.c

@@ -65,7 +65,7 @@ static struct hash_alg *_get_alg(const char *name)
 	return NULL;
 }
 
-int crypt_backend_init(void)
+int crypt_backend_init(struct crypt_device *ctx)
 {
 	if (crypto_backend_initialised)
 		return 0;