Clear references before update the template

git-svn-id: https://svn.code.sf.net/p/gettextnet/code@19 cfd95cc2-f724-4227-9a96-9a83de4730d4

GNU.Gettext/GNU.Gettext.Msgfmt/Program.cs

@@ -122,7 +122,7 @@ namespace GNU.Gettext.Msgfmt
 
             options.Mode = Mode.SateliteAssembly;
 			options.Verbose = false;
-			options.CompilerName = "mcs";
+			options.CompilerName = Path.DirectorySeparatorChar == '/' ? "mcs" : "csc";
 			options.ShowUsage = false;
 			options.DebugMode = false;
 

GNU.Gettext/GNU.Gettext.Xgettext/ExtractorCsharp.cs

@@ -44,7 +44,11 @@ namespace GNU.Gettext.Xgettext
 			this.Options = options;
 			this.Catalog = new Catalog();
 			if (!Options.Overwrite && File.Exists(Options.OutFile))
+			{
 				Catalog.Load(Options.OutFile);
+				foreach(CatalogEntry entry in Catalog)
+					entry.ClearReferences();
+			}
 			else
 			{
 				Catalog.Project = "PACKAGE VERSION";