Issuing a z -clean command when there are no directories to clean generates an error

[badmotorfinger]

When issuing the z command with the clean parameter and there are no directories for cleaning, it generates the following error

System.Management.Automation.ParameterBindingValidationException: Cannot bind argument to parameter 'Path' because it is null.
at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)

@Ralesi There is a bug in your implementation