Fix incorrect output of Get-Location when using UseCanonical

[anton-evseev]

If $resourceType passed in Get-Location isn't found and UseCanonical is used, the function returns null instead of default location.

Since no resource type was found, locations array is $null. So when each element of locations is being normalized through ForEach-Object the following statement returns non-empty array: $null | ForEach-Object. Because of that, if-statement $locations.Count -ne 0 is true and $locations[0] returns @($null)[0] i.e. $null

Example:

PS C:\> Get-Location "Microsoft.Network" "Usages" "westus"
West US
PS C:\> Get-Location "Microsoft.Network" "Usages" "westus" -UseCanonical

[anton-evseev]

@MiYanni please take a look

[MiYanni]

@number213 Good find. I'll be making a PR to this repo this week. I'll merge this and my PR, and cut another build. I'll have to coordinate when we consume the new package since it won't include net452 assemblies.

[MiYanni]

LGTM