cube.cpp: fix uninit non-static member.

This was pointed out by coverity.

diff --git a/cube/cube.cpp b/cube/cube.cpp
index e30c516..7a6dae1 100644 (file)
--- a/cube/cube.cpp
+++ b/cube/cube.cpp
@@ -538,6 +538,7 @@ Demo::Demo()
       width{0},
       height{0},
       swapchainImageCount{0},
+      presentMode{vk::PresentModeKHR::eFifo},
       frame_index{0},
       spin_angle{0.0f},
       spin_increment{0.0f},