SRCLST_showErrorIfClientUsesEfiButSourcesListDoesntSupportEfi

Description: Shows an error message, if the client uses EFI and the choosen sources list doesn't.
Parameter:

• client: Name of the client.
• sourceName: The name of the package source list.

Returns:

• : false, if the client uses EFI and the choosen sources list doesn't, otherwise true.