anv: call base finish only if pass given in DestroyRenderPass

Fixes: 682c81bdfb ("vulkan,anv: Add a base object struct type")
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4936>

src/intel/vulkan/anv_pass.c

@@ -593,6 +593,9 @@ void anv_DestroyRenderPass(
    ANV_FROM_HANDLE(anv_device, device, _device);
    ANV_FROM_HANDLE(anv_render_pass, pass, _pass);
 
+   if (!pass)
+      return;
+
    vk_object_base_finish(&pass->base);
    vk_free2(&device->vk.alloc, pAllocator, pass);
 }