initialize GoL variables, add sim.gspeed function

src/lua/LuaScriptInterface.cpp

@@ -742,6 +742,7 @@ void LuaScriptInterface::initSimulationAPI()
 		{"neighbours", simulation_neighbours},
 		{"neighbors", simulation_neighbours},
 		{"framerender", simulation_framerender},
+		{"gspeed", simulation_gspeed},
 		{NULL, NULL}
 	};
 	luaL_register(l, "simulation", simulationAPIMethods);
@@ -1981,6 +1982,20 @@ int LuaScriptInterface::simulation_framerender(lua_State * l)
 	return 0;
 }
 
+int LuaScriptInterface::simulation_gspeed(lua_State * l)
+{
+	if (lua_gettop(l) == 0)
+	{
+		lua_pushinteger(l, luacon_sim->GSPEED);
+		return 1;
+	}
+	int gspeed = luaL_checkinteger(l, 1);
+	if (gspeed < 1)
+		return luaL_error(l, "GSPEED must be at least 1");
+	luacon_sim->GSPEED = gspeed;
+	return 0;
+}
+
 //// Begin Renderer API
 
 void LuaScriptInterface::initRendererAPI()

src/lua/LuaScriptInterface.h

@@ -106,6 +106,7 @@ class LuaScriptInterface: public CommandInterface
 	static int simulation_photons(lua_State * l);
 	static int simulation_neighbours(lua_State * l);
 	static int simulation_framerender(lua_State * l);
+	static int simulation_gspeed(lua_State * l);
 
 	//Renderer
 	void initRendererAPI();

src/simulation/Simulation.cpp

@@ -5050,6 +5050,8 @@ Simulation::Simulation():
 	emp_decor(0),
 	lightningRecreate(0),
 	gravWallChanged(false),
+	CGOL(0),
+	GSPEED(1),
 	edgeMode(0),
 	gravityMode(0),
 	legacy_enable(0),