Fix NPE when there are two repositories which only differ in case

Sascha Vogt

2014-06-18 396e9bb50d7eca0d96da2c5fc5177a22f78d30b7

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[submodule "src/main/distrib/data/gitignore"]
    path = src/main/distrib/data/gitignore
    url = https://github.com/github/gitignore.git