composer/composer — pull request #1231 by FrenkyNet (2012-10-18 15:45:11+00:00)
Title: Fixed Composer\Autoload\ClassLoader::findFile failure return value inconsistency.

Normally on a first run, the there is no return value, resulting in `null`, on a second check on the same file, the classmap will contain a value of false. If we set the classMap result to `null` the isset won't work anymore, so when `false` it now returns `null`, consistently.