fix for CI

h3d/impl/VulkanDriver.hx

@@ -1,6 +1,8 @@
 package h3d.impl;
 import h3d.impl.Driver;
 
+#if (hlsdl && heaps_vulkan)
+
 class VulkanDriver extends Driver {
 
 	var ctx : sdl.Vulkan.VKContext;
@@ -79,4 +81,6 @@ class VulkanDriver extends Driver {
 		return cast {};
 	}
 
-}
+}
+
+#end