Error reports after last update
Hi all,
getting many errors like following since last update:


```
Compare-Object : Cannot bind argument to parameter 'DifferenceObject' because it is null.
At C:\Users\x\Desktop\MultiPoolMiner\MultiPoolMiner\MultiPoolMiner.ps1:360 char:257
+ ... SObject.Properties.Name $_.HashRates.PSObject.Properties.Name | Where ...
+                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidData: (:) [Compare-Object], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.CompareObjectCommand

Compare-Object : Cannot bind argument to parameter 'DifferenceObject' because it is null.
At C:\Users\x\Desktop\MultiPoolMiner\MultiPoolMiner\MultiPoolMiner.ps1:360 char:257
+ ... SObject.Properties.Name $_.HashRates.PSObject.Properties.Name | Where ...
+                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```