Add C conversion constructors to fix leak of default-constructed empty arrays

include/core/Array.hpp

@@ -57,6 +57,11 @@ class Object;
 class Array {
 	godot_array _godot_array;
 
+	friend class Variant;
+	inline explicit Array(const godot_array &other) {
+		_godot_array = other;
+	}
+
 public:
 	Array();
 	Array(const Array &other);

include/core/Dictionary.hpp

@@ -12,6 +12,11 @@ namespace godot {
 class Dictionary {
 	godot_dictionary _godot_dictionary;
 
+	friend Variant::operator Dictionary() const;
+	inline explicit Dictionary(const godot_dictionary &other) {
+		_godot_dictionary = other;
+	}
+
 public:
 	Dictionary();
 	Dictionary(const Dictionary &other);

src/core/Variant.cpp

@@ -261,14 +261,12 @@ Variant::operator RID() const {
 }
 
 Variant::operator Dictionary() const {
-	Dictionary ret;
+	Dictionary ret(godot::api->godot_variant_as_dictionary(&_godot_variant));
-	*(godot_dictionary *)&ret = godot::api->godot_variant_as_dictionary(&_godot_variant);
 	return ret;
 }
 
 Variant::operator Array() const {
-	Array ret;
+	Array ret(godot::api->godot_variant_as_array(&_godot_variant));
-	*(godot_array *)&ret = godot::api->godot_variant_as_array(&_godot_variant);
 	return ret;
 }