db: fix valuelogfilesize calc

for some reason I thought it was in kibibytes? no, its in bytes as it
    should be.

storage.go

@@ -175,7 +175,8 @@ func generateLogActions(c *ini.File) map[string]DebugLogAction {
 
 func (app *appContext) ConnectDB() {
 	opts := badgerhold.DefaultOptions
-	opts.Options.ValueLogFileSize = app.config.Section("advanced").Key("value_log_size").MustInt64(1024) * 1024
+	// ValueLogFileSize is in bytes, so multiply by 1e6
+	opts.Options.ValueLogFileSize = app.config.Section("advanced").Key("value_log_size").MustInt64(256) * 1e6
 	opts.Dir = app.storage.db_path
 	opts.ValueDir = app.storage.db_path
 	db, err := badgerhold.Open(opts)