LuaConsole - protect WriteToOutputWindow() and ClearOutputWindow() in case lua console is closed when called. Close the lua object on LuaConsole close (fixes some crashes).

BizHawk.MultiClient/LuaImplementation.cs

@@ -28,6 +28,12 @@ namespace BizHawk.MultiClient
 			Caller = passed.get();
 			LuaRegister(lua);
 		}
+
+		public void Close()
+		{
+			lua.Close();
+		}
+
 		public void LuaRegister(Lua lua)
 		{
 			lua.RegisterFunction("print", this, this.GetType().GetMethod("print"));

BizHawk.MultiClient/tools/LuaConsole.cs

@@ -104,6 +104,7 @@ namespace BizHawk.MultiClient
 
 		private void SaveConfigSettings()
 		{
+			LuaImp.Close();
 			Global.Config.LuaConsoleWndx = this.Location.X;
 			Global.Config.LuaConsoleWndy = this.Location.Y;
 			Global.Config.LuaConsoleWidth = this.Right - this.Left;
@@ -559,12 +560,18 @@ namespace BizHawk.MultiClient
 
 		public void WriteToOutputWindow(string message)
 		{
+			if (!OutputBox.IsHandleCreated || OutputBox.IsDisposed)
+				return;
+
 			OutputBox.Text += message;
 			OutputBox.Refresh();
 		}
 
 		public void ClearOutputWindow()
 		{
+			if (!OutputBox.IsHandleCreated || OutputBox.IsDisposed)
+				return;
+			
 			OutputBox.Text = "";
 			OutputBox.Refresh();
 		}