[fix] fix engine initialization
[fix] fix engine initialization

jcherqui/searx,jcherqui/searx,asciimoo/searx,asciimoo/searx,dalf/searx,asciimoo/searx,jcherqui/searx,jcherqui/searx,dalf/searx,dalf/searx,asciimoo/searx,dalf/searx