Fixed uninitialized variable problem in Tutorial05 and formatting (unnecessary spaces) in tutorials 04 and 05.

Project/Tutorial05/Tutorial05.h

@@ -83,6 +83,7 @@ namespace ApiWithoutSecrets {
       RenderPass( VK_NULL_HANDLE ),
       GraphicsPipeline( VK_NULL_HANDLE ),
       VertexBuffer(),
+      StagingBuffer(),
       CommandPool( VK_NULL_HANDLE ),
       RenderingResources( ResourcesCount ) {
     }