minor fixes

added missing semicolon
use lodash to avoid errors

Author: Roy Hui

lib/logs.js

@@ -55,12 +55,12 @@ module.exports = {
 			orderBy: 'LastEventTime',
 		};
 
-		let aliasGetAliasFunctionVersion
+		let aliasGetAliasFunctionVersion;
 		// Check if --version is specified
 		if (this._options.version) {
-			aliasGetAliasFunctionVersion = BbPromise.resolve(this._options.version)
+			aliasGetAliasFunctionVersion = BbPromise.resolve(this._options.version);
 		} else {
-			aliasGetAliasFunctionVersion = this.aliasGetAliasLatestFunctionVersionByFunctionName(this._alias, this._lambdaName)
+			aliasGetAliasFunctionVersion = this.aliasGetAliasLatestFunctionVersionByFunctionName(this._alias, this._lambdaName);
 		}
 		// Get currently deployed function version for the alias to
 		// setup the stream filter correctly
@@ -125,7 +125,7 @@ module.exports = {
 	},
 
 	functionLogsShowLogs(logStreamNames) {
-		if (logStreamNames.length === 0) {
+		if (_.isEmpty(logStreamNames)) {
 			return BbPromise.reject(new this.serverless.classes
 				.Error('No existing streams for the latest version of function alias. If you want to view logs of a specific function version, please use --version to specify'));
 		}

lib/stackInformation.js

@@ -187,9 +187,7 @@ module.exports = {
 			{ FunctionName: functionName, Name: aliasName },
 			this._options.stage,
 			this._options.region)
-			.then(result => {
-				return result.FunctionVersion
-			})
+			.then(result => _.get(result, 'FunctionVersion', null));
 	},
 
 };