st/va: fix incorrect use of resource_destroy

Fixes: 4373dd3215 ("st/va: Support YUV formats in vaCreateSurfaces")
Cc: Drew Davenport <ddavenport@chromium.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

src/gallium/state_trackers/va/surface.c

@@ -598,10 +598,8 @@ surface_from_external_memory(VADriverContextP ctx, vlVaSurface *surface,
    return VA_STATUS_SUCCESS;
 
 fail:
-   for (i = 0; i < VL_NUM_COMPONENTS; i++) {
-      if (resources[i])
-         pscreen->resource_destroy(pscreen, resources[i]);
-   }
+   for (i = 0; i < VL_NUM_COMPONENTS; i++)
+      pipe_resource_reference(&resources[i], NULL);
    return result;
 }