Fix handling of parentheses for -Lang option

* Closes #29

Fido.ps1

@@ -1,5 +1,5 @@
 #
-# Fido v1.33 - Feature ISO Downloader, for retail Windows images and UEFI Shell
+# Fido v1.34 - Feature ISO Downloader, for retail Windows images and UEFI Shell
 # Copyright © 2019-2022 Pete Batard <pete@akeo.ie>
 # Command line support: Copyright © 2021 flx5
 # ConvertTo-ImageSource: Copyright © 2016 Chris Carter
@@ -80,11 +80,12 @@ $code = @"
 
 if (!$Cmd) {
 	Write-Host Please Wait...
+	$Drawing_Assembly = "System.Drawing"
+	# PowerShell 7 altered the name of the Drawing assembly...
 	if ($host.version -ge "7.0") {
-		Add-Type -WarningAction Ignore -IgnoreWarnings -MemberDefinition $code -Namespace Gui -UsingNamespace System.Runtime, System.IO, System.Text, System.Drawing, System.Globalization -ReferencedAssemblies System.Drawing.Common -Name Utils -ErrorAction Stop
-	} else {
-		Add-Type -MemberDefinition $code -Namespace Gui -UsingNamespace System.IO, System.Text, System.Drawing, System.Globalization -ReferencedAssemblies System.Drawing -Name Utils -ErrorAction Stop
+		$Drawing_Assembly += ".Common"
 	}
+	Add-Type -ErrorAction Stop -WarningAction Ignore -IgnoreWarnings -MemberDefinition $code -Namespace Gui -UsingNamespace System.Runtime, System.IO, System.Text, System.Drawing, System.Globalization -ReferencedAssemblies $Drawing_Assembly -Name Utils
 	Add-Type -AssemblyName PresentationFramework
 	# Hide the powershell window: https://stackoverflow.com/a/27992426/1069307
 	[Gui.Utils]::ShowWindow(([System.Diagnostics.Process]::GetCurrentProcess() | Get-Process).MainWindowHandle, 0) | Out-Null
@@ -960,6 +961,10 @@ if ($Cmd) {
 	}
 	if ($Lang -eq "List") {
 		Write-Host "Please select a Language (-Lang) for ${Selected}:"
+	} elseif ($Lang) {
+		# Escape parentheses so that they aren't interpreted as regex
+		$Lang = $Lang.replace('(', '\(')
+		$Lang = $Lang.replace(')', '\)')
 	}
 	$i = 0
 	foreach ($language in $languages) {
@@ -976,7 +981,7 @@ if ($Cmd) {
 		}
 		$i++
 	}
-	if ($winLanguageId -eq $null -or $winLanguageName -eq $null) {
+	if (!$winLanguageId -or !$winLanguageName) {
 		if ($Lang -ne "List") {
 			Write-Host "Invalid Windows language provided."
 			Write-Host "Use '-Lang List' for a list of available languages or remove the option to use system default."
@@ -1172,8 +1177,8 @@ exit $ExitCode
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@@ -1276,23 +1281,23 @@ exit $ExitCode
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@@ -1355,13 +1360,13 @@ exit $ExitCode
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 # SIG # End signature block