better instance logging support

OpenRA.FileFormats/Support/Log.cs

@@ -55,19 +55,23 @@ namespace OpenRA
 		{
 			if (channels.ContainsKey(channelName)) return;
 			
-			/* HACK: avoid sharing violations if running multiple instances */
+			var i = 0;
-			StreamWriter writer = null;
+			var f = filename;
-			while (writer == null)
+			while (File.Exists(LogPathPrefix + filename))
-			{
 				try 
 				{
-					writer = File.CreateText(LogPathPrefix + filename);
+					StreamWriter writer = File.CreateText(LogPathPrefix + filename);
-				}
-				catch(IOException){ filename = new Random().Next().ToString() + filename; }
-			}
-			
 					writer.AutoFlush = true;
 					channels.Add(channelName, new ChannelInfo() { Upload = upload, Filename = filename, Writer = writer, Diff = diff });
+					return;
+				}
+				catch (IOException) { filename = f + ".{0}".F(++i); }
+			
+			//if no logs exist, just make it
+			StreamWriter w = File.CreateText(LogPathPrefix + filename);
+			w.AutoFlush = true;
+			channels.Add(channelName, new ChannelInfo() { Upload = upload, Filename = filename, Writer = w, Diff = diff });
+			
 		}
 
 		public static void Write(string channel, string format, params object[] args)

OpenRA.Game/Game.cs

@@ -626,7 +626,11 @@ namespace OpenRA
 
 		public static void Exit() { quit = true; }
 
-		public static void Debug(string s) { Chrome.chatWidget.AddLine(Color.White, "Debug", s); }
+		public static void Debug(string s) 	
+		{
+			if (Chrome.chatWidget != null)
+				Chrome.chatWidget.AddLine(Color.White, "Debug", s); 
+		}
 
 		public static void Disconnect()
 		{