tests: always call db_migrate() with non-NULL ld.

This will be useful when we add hooks.  For the moment, ld's contents is
undefined, but this can easily be changed.

wallet/test/run-db.c

@@ -51,14 +51,14 @@ static struct db *create_test_db(void)
 	return db;
 }
 
-static bool test_empty_db_migrate(void)
+static bool test_empty_db_migrate(struct lightningd *ld)
 {
 	struct db *db = create_test_db();
 	CHECK(db);
 	db_begin_transaction(db);
 	CHECK(db_get_version(db) == -1);
 	db_commit_transaction(db);
-	db_migrate(NULL, db, NULL);
+	db_migrate(ld, db, NULL);
 	db_begin_transaction(db);
 	CHECK(db_get_version(db) == ARRAY_SIZE(dbmigrations) - 1);
 	db_commit_transaction(db);
@@ -91,12 +91,12 @@ static bool test_primitives(void)
 	return true;
 }
 
-static bool test_vars(void)
+static bool test_vars(struct lightningd *ld)
 {
 	struct db *db = create_test_db();
 	char *varname = "testvar";
 	CHECK(db);
-	db_migrate(NULL, db, NULL);
+	db_migrate(ld, db, NULL);
 
 	db_begin_transaction(db);
 	/* Check default behavior */
@@ -120,10 +120,13 @@ int main(void)
 	setup_locale();
 
 	bool ok = true;
+	/* Dummy for migration hooks */
+	struct lightningd *ld = tal(NULL, struct lightningd);
 
-	ok &= test_empty_db_migrate();
+	ok &= test_empty_db_migrate(ld);
-	ok &= test_vars();
+	ok &= test_vars(ld);
 	ok &= test_primitives();
 
+	tal_free(ld);
 	return !ok;
 }

wallet/test/run-wallet.c

@@ -671,7 +671,7 @@ static struct wallet *create_test_wallet(struct lightningd *ld, const tal_t *ctx
 				  w->bip32_base) == WALLY_OK);
 
 	CHECK_MSG(w->db, "Failed opening the db");
-	db_migrate(NULL, w->db, w->log);
+	db_migrate(ld, w->db, w->log);
 	CHECK_MSG(!wallet_err, "DB migration failed");
 	w->max_channel_dbid = 0;