Use validated key in Dictionary::has

Updated Dictionary::has to use validated key when checking variant_map, to handle cases when passed in key is converted to Dictionary's key type.

core/variant/dictionary.cpp

@@ -218,7 +218,7 @@ bool Dictionary::is_empty() const {
 bool Dictionary::has(const Variant &p_key) const {
 	Variant key = p_key;
 	ERR_FAIL_COND_V(!_p->typed_key.validate(key, "use 'has'"), false);
-	return _p->variant_map.has(p_key);
+	return _p->variant_map.has(key);
 }
 
 bool Dictionary::has_all(const Array &p_keys) const {