Very minor channel / variant performance improvements and cleanup.

src/modules/event/Event.cpp

@@ -63,14 +63,14 @@ Message *Message::fromLua(lua_State *L, int n)
 		if (lua_isnoneornil(L, n+i))
 			break;
 
-		if (!Variant::fromLua(L, n+i, &varg))
+		vargs.push_back(Variant::fromLua(L, n+i));
+
+		if (vargs.back().getType() == Variant::UNKNOWN)
 		{
 			vargs.clear();
 			luaL_error(L, "Argument %d can't be stored safely\nExpected boolean, number, string or userdata.", n+i);
 			return nullptr;
 		}
-
-		vargs.push_back(varg);
 	}
 
 	return new Message(name, vargs);

src/modules/event/wrap_Event.cpp

@@ -93,11 +93,7 @@ int w_clear(lua_State *)
 
 int w_quit(lua_State *L)
 {
-	std::vector<Variant> args;
-
-	Variant v;
-	if (Variant::fromLua(L, 1, &v))
-		args.push_back(v);
+	std::vector<Variant> args = {Variant::fromLua(L, 1)};
 
 	StrongRef<Message> m(new Message("quit", args), Acquire::NORETAIN);
 	instance()->push(m);

src/modules/thread/wrap_Channel.cpp

@@ -33,8 +33,8 @@ Channel *luax_checkchannel(lua_State *L, int idx)
 int w_Channel_push(lua_State *L)
 {
 	Channel *c = luax_checkchannel(L, 1);
-	Variant var;
-	if (!Variant::fromLua(L, 2, &var))
+	Variant var = Variant::fromLua(L, 2);
+	if (var.getType() == Variant::UNKNOWN)
 		return luaL_argerror(L, 2, "boolean, number, string, love type, or flat table expected");
 	c->push(var);
 	return 0;
@@ -43,8 +43,8 @@ int w_Channel_push(lua_State *L)
 int w_Channel_supply(lua_State *L)
 {
 	Channel *c = luax_checkchannel(L, 1);
-	Variant var;
-	if (!Variant::fromLua(L, 2, &var))
+	Variant var = Variant::fromLua(L, 2);
+	if (var.getType() == Variant::UNKNOWN)
 		return luaL_argerror(L, 2, "boolean, number, string, love type, or flat table expected");
 	c->supply(var);
 	return 0;

src/modules/thread/wrap_LuaThread.cpp

@@ -36,16 +36,15 @@ int w_Thread_start(lua_State *L)
 	std::vector<Variant> args;
 	int nargs = lua_gettop(L) - 1;
 
-	Variant v;
 	for (int i = 0; i < nargs; ++i)
 	{
-		if (!Variant::fromLua(L, i+2, &v))
+		args.push_back(Variant::fromLua(L, i+2));
+
+		if (args.back().getType() == Variant::UNKNOWN)
 		{
 			args.clear();
 			return luaL_argerror(L, i+2, "boolean, number, string, love type, or flat table expected");
 		}
-
-		args.push_back(v);
 	}
 
 	luax_pushboolean(L, t->start(args));