Fix some more return types (#151)

Author: Trey2k

src/classes/luaTuple.cpp

@@ -15,8 +15,9 @@ void LuaTuple::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("to_array"), &LuaTuple::toArray);
 }
 
-LuaTuple *LuaTuple::fromArray(Array elms) {
-	LuaTuple *tuple = memnew(LuaTuple);
+Ref<LuaTuple> LuaTuple::fromArray(Array elms) {
+	Ref<LuaTuple> tuple;
+	tuple.instantiate();
 	tuple->elements = elms;
 	return tuple;
 }

src/classes/luaTuple.h

@@ -20,7 +20,7 @@ class LuaTuple : public RefCounted {
 	static void _bind_methods();
 
 public:
-	static LuaTuple *fromArray(Array elms);
+	static Ref<LuaTuple> fromArray(Array elms);
 
 	void pushBack(Variant var);
 	void pushFront(Variant var);