Don't filter further if returned list is empty
Don't filter further if returned list is empty

Fixes an exception when looking for a specific key in _list.txt but no data is returned. For example, searching for MYSTERY_S for gamecd IRAO.
polaris-/dwc_network_server_emulator,eshoyfer/dwc_network_server_emulator,sepalani/dwc_network_server_emulator,polaris-/dwc_network_server_emulator,ZehCariocaRj/dwc_network_server_emulator_kyle95wm,bmezali/dwc_network_server_emulator,sepalani/dwc_network_server_emulator,ZehCariocaRj/dwc_network_server_emulator_kyle95wm