Merge pull request #45 from 178inaba/cmd_error_log

Fix to output error log of cmd

cmd/mstdn/main.go

@@ -339,7 +339,7 @@ func run() int {
 		return nil
 	}
 
-	app.Run(os.Args)
+	fatalIf(app.Run(os.Args))
 	return 0
 }