vulkaninfo: Fix running under RenderDoc

RenderDoc allows only one simultaneously existing logical device, and
vulkaninfo doesn't have a real need to keep them simultaneously alive.

Running vulkaninfo under RenderDoc is useful to get a Vulkan profile
that will represent the RenderDoc capabilities on the current GPU,
which can be useful to, e.g., make a gfxreconstruct trace that will be
later capturable by RenderDoc.

Signed-off-by: Danylo Piliaiev <[email protected]>

Author: werman

vulkaninfo/vulkaninfo.h

@@ -1814,6 +1814,9 @@ struct AppGpu {
 
         // Video //
         video_profiles = enumerate_supported_video_profiles(*this);
+
+        vkDestroyDevice(dev, nullptr);
+        dev = VK_NULL_HANDLE;
     }
     ~AppGpu() { vkDestroyDevice(dev, nullptr); }