Checks that getForPackageVersion() has returned a ConstraintInterface

[bikerdave]

If you use a configuration without package versions specified it only works on the initial composer install.

{
    "patches": {
        "vendor/project": {
            "Patch description": "https://www.example.com/remote.patch",
        }
    }
}

The next time composer install is run a PatchAlreadyApplied exception is raised, but fails when the constructor tries to get the package version:

// $patch->getForPackageVersion() returns null
$message = 'The patch "'.$patch->getDescription().'" for '.$patch->getForPackageVersion()->getPrettyString().' provided by '.$patch->getFromPackage()->__toString().' is already applied.';

[mlocati]

👍 thanks!!