Fix memory leaks in `parson_object_set_*` when `object` is invalid

parson.c

@@ -1776,19 +1776,39 @@ JSON_Status json_object_set_value(JSON_Object *object, const char *name, JSON_Va
 }
 
 JSON_Status json_object_set_string(JSON_Object *object, const char *name, const char *string) {
-    return json_object_set_value(object, name, json_value_init_string(string));
+    JSON_Value *value = json_value_init_string(string);
+    JSON_Status status = json_object_set_value(object, name, value);
+    if (status == JSONFailure) {
+        json_value_free(value);
+    }
+    return status;
 }
 
 JSON_Status json_object_set_number(JSON_Object *object, const char *name, double number) {
-    return json_object_set_value(object, name, json_value_init_number(number));
+    JSON_Value *value = json_value_init_number(number);
+    JSON_Status status = json_object_set_value(object, name, value);
+    if (status == JSONFailure) {
+        json_value_free(value);
+    }
+    return status;
 }
 
 JSON_Status json_object_set_boolean(JSON_Object *object, const char *name, int boolean) {
-    return json_object_set_value(object, name, json_value_init_boolean(boolean));
+    JSON_Value *value = json_value_init_boolean(boolean);
+    JSON_Status status = json_object_set_value(object, name, value);
+    if (status == JSONFailure) {
+        json_value_free(value);
+    }
+    return status;
 }
 
 JSON_Status json_object_set_null(JSON_Object *object, const char *name) {
-    return json_object_set_value(object, name, json_value_init_null());
+    JSON_Value *value = json_value_init_null();
+    JSON_Status status = json_object_set_value(object, name, value);
+    if (status == JSONFailure) {
+        json_value_free(value);
+    }
+    return status;
 }
 
 JSON_Status json_object_dotset_value(JSON_Object *object, const char *name, JSON_Value *value) {