filepath variable is not always set

[johnennewdeeson]

Getting this error when executing moosh file-upload --filename=169.mbz /app/moodledata/backup.mdz

Notice: Undefined variable: filepath in /app/vendor/tmuras/moosh/Moosh/Command/Moodle23/File/FileUpload.php on line 71
Default exception handler: Cannot read file. Either the file does not exist or there is a permission problem. Debug:
Error code: storedfilecannotread```

Looking at the code in `FileUpload.php` $filepath variable is only set when the specified file does not start with a leading forward slash. In addition, $arguments[0] is used to reference the filepath throughout the code so suggest its more consistent to just use that throughout.