updated HtmlHelp2Options.cs a little bit

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1453 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/HtmlHelp2/Project/src/Service/HtmlHelp2Options.cs

@@ -24,7 +24,6 @@ namespace HtmlHelp2.OptionsPanel
 	public class HtmlHelp2OptionsPanel : AbstractOptionPanel
 	{
 		static string help2EnvironmentFile = "help2environment.xml";
-		bool Help2EnvIsReady               = false;
 		ComboBox help2Collections          = null;
 		string selectedHelp2Collection     = HtmlHelp2Environment.DefaultNamespaceName;
 
@@ -45,12 +44,10 @@ namespace HtmlHelp2.OptionsPanel
 
 		private void InitializeComponents()
 		{
-			Help2EnvIsReady                  = HtmlHelp2Environment.IsReady;
-
 			try
 			{
 				help2Collections             = (ComboBox)ControlDictionary["help2Collections"];
-				help2Collections.Enabled     = Help2EnvIsReady;
+				help2Collections.Enabled     = HtmlHelp2Environment.IsReady;
 				help2Collections.SelectedIndexChanged += new EventHandler(this.NamespaceNameChanged);
 				selectedHelp2Collection      = HtmlHelp2Environment.CurrentSelectedNamespace;
 
@@ -73,6 +70,11 @@ namespace HtmlHelp2.OptionsPanel
 
 		private void SaveHelp2Config()
 		{
+			if (selectedHelp2Collection.Length == 0)
+			{
+				return;
+			}
+
 			try
 			{
 				XmlDocument xmldoc    = new XmlDocument();