message: Check for null config settings a bit safer
  Fixes
diff: @@ -17,6 +17,7 @@ limitations under the License.
  import SettingsHandler from "./SettingsHandler";
  import SdkConfig from "../../SdkConfig";
  +import {isNullOrUndefined} from "matrix-js-sdk/src/utils";
  /**
  * Gets and sets settings at the "config" level. This handler does not make use of the
  @@ -32,7 +33,7 @@ export default class ConfigSettingsHandler extends SettingsHandler {
  }
  const settingsConfig = config["settingDefaults"];
  - if (!settingsConfig || !settingsConfig[settingName]) return null;
  + if (!settingsConfig || isNullOrUndefined(settingsConfig[settingName])) return null;
  return settingsConfig[settingName];
  }
  