lavapipe: fix a leak on a lvp_image_create exit path

This traces back to c688f8f8c5c3d3d3e1fe3f84679f972d7f8ead30, but the
shape of the fix would be different if against that. So we do the
optimal for the current code flow and only port to stable.

Cc: mesa-stable
Reviewed-by: Lucas Fryzek <lfryzek@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36335>
1 file changed