dolphin-emu/dolphin — pull request #203 by Sonicadvance1 (2014-03-24 03:31:03+00:00)
Title: Fix a crash that got recently introduced.

When CFileSystemGCWii::GetFileName can't find a valid filename it would return nullptr.
nullptr as a std::string throws an assert within the std lib.
So return an empty string and check if it is empty or not