added MIData at Material

src/SceneGraph/Vulkan/VKMaterial.cpp

@@ -16,8 +16,16 @@ MaterialData::~MaterialData()
     delete vertex_input;
 }
 
+Material::Material(MaterialData *md):data(md)
+{
+    mi_size=0;
+    mi_count=0;
+}
+
 Material::~Material()
 {
+    delete[] data->mi_data;
+
     delete data->pipeline_layout_data;
     delete data;
 }