Add missing refcount increment

docs/src/tutorial/resource_management.jl

@@ -8,6 +8,7 @@ set_driver(:SwiftShader) # hide
 
 Vulkan.set_preferences!("LOG_DESTRUCTION" => "true")
 
+# You will need to restart your session and import Vulkan again, for changes to take effect.
 # Now let's create a bunch of handles and see what happens when the GC runs:
 
 function do_something()

src/prewrap/handles.jl

@@ -91,6 +91,7 @@ function depends_on(x::Vk.Handle, handle::Vk.Handle)
 end
 
 function depends_on(x, handle::Vk.Handle)
+    Vk.increment_refcount!(handle)
     T = typeof(x)
     ismutabletype(T) || error("`x` must be a mutable object or a `Vk.Handle`")
     finalizer(_ -> handle.destructor(), x)