Tweaked again

src/Engine/engine/engine.h

@@ -2240,6 +2240,7 @@ void Engine::getAvailableGPU() {
   // Create a minimal instance
   auto instRet = builder.set_app_name("Engine")
     .request_validation_layers(false)
+    .set_headless()
     .require_api_version(1, 3, 0)
     .build();
 
@@ -2277,6 +2278,8 @@ void Engine::getAvailableGPU() {
     );
     _logger.logAll(ENGINE, EINFO, "GPU {}:\n{}", i, deviceProperties.properties.deviceName);
   }
+
+  vkbInst.destroy();
 }
 
 #endif