update type conversion

Tools.ps1

@@ -126,11 +126,11 @@ param(
     [string]$Arguments='null',
     [Parameter(Mandatory=$false,ParameterSetName='live-ps')]
     [Parameter(Mandatory=$false,ParameterSetName='local')]
-    [System.Collections.ArrayList]$HaltIfRunning='null'
+    [System.Collections.ArrayList]$HaltIfRunning
 )
 $LogName = $MyInvocation.MyCommand
 If ( $Arguments -eq "null" ) { $Arguments = $null }
-If ( $HaltIfRunning -eq "null" ) { $HaltIfRunning = $null }
+#If (! ($HaltIfRunning) ) { $HaltIfRunning = $null }
 switch ($PSCmdlet.ParameterSetName)
 {
     'live-ps'
@@ -151,7 +151,7 @@ switch ($PSCmdlet.ParameterSetName)
         If ( Test-Path $Path )
         {
             $Halt = $false
-            If ( $HaltIfRunning -ne $null )
+            If ( $HaltIfRunning )
             {
                 Log "Checking for running instances of the following dependent apps:" -Name $LogName
                 ForEach ( $name in $HaltIfRunning)