Empty urls.txt makes createScmRepos method fail

[Janhout]

When "repoList = (com.executeCommand(command1).split("\r?\n"));" is executed with empty "workspace + cartHome + '/src/urls.txt'" file, you will get an Array with length == 1. Then the following sentence is executed one time and it fails because 'repo' is an empty String and repo.indexOf("anything") returns -1

String repoName = repo.substring(repo.lastIndexOf("/") + 1, repo.indexOf(".git"));