Proper checking if lua is running when doing thread waiting/set

BizHawk.MultiClient/LuaImplementation.cs

@@ -32,6 +32,7 @@ namespace BizHawk.MultiClient
 		public void Close()
 		{
 			lua.Close();
+			LuaWait.Dispose();
 		}
 
 		public void LuaRegister(Lua lua)

BizHawk.MultiClient/MainForm.cs

@@ -1620,12 +1620,12 @@ namespace BizHawk.MultiClient
 			if (runFrame)
 			{
 				//client input-related duties
-				if (LuaConsole1.LuaImp.isRunning)
+				if (LuaConsole1.IsRunning())
 				{
-					LuaConsole1.LuaImp.LuaWait.WaitOne();
+					LuaConsole1.WaitOne();
 				}
 
-				if (LuaConsole1.LuaImp.isRunning)
+				if (LuaConsole1.IsRunning())
 				{
 					Global.MainForm.MainWait.Set();
 				}

BizHawk.MultiClient/tools/LuaConsole.cs

@@ -646,5 +646,27 @@ namespace BizHawk.MultiClient
 			OpenLuaSession();
 		}
 
+		public bool IsRunning()
+		{
+			if (!this.IsHandleCreated || this.IsDisposed)
+			{
+				return false;
+			}
+			else
+			{
+				if (LuaImp.isRunning)
+					return true;
+				else
+					return false;
+			}
+		}
+
+		public void WaitOne()
+		{
+			if (!this.IsHandleCreated || this.IsDisposed)
+				return;
+
+			this.LuaImp.LuaWait.WaitOne();
+		}
 	}
 }