zink: destroy transfer-helper

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8099>

src/gallium/drivers/zink/zink_screen.c

@@ -39,6 +39,7 @@
 #include "util/u_memory.h"
 #include "util/u_screen.h"
 #include "util/u_string.h"
+#include "util/u_transfer_helper.h"
 
 #include "frontend/sw_winsys.h"
 
@@ -679,6 +680,8 @@ zink_destroy_screen(struct pipe_screen *pscreen)
       screen->vk_DestroyDebugUtilsMessengerEXT(screen->instance, screen->debugUtilsCallbackHandle, NULL);
    }
 
+   u_transfer_helper_destroy(pscreen->transfer_helper);
+
    slab_destroy_parent(&screen->transfer_pool);
    FREE(screen);
 }