Fix positioning so that the EIA-608 field is properly centered

Because the subpicture field contains all the lines, we need to change the
layout.
Signed-off-by: Rafaël Carré <funman@videolan.org>

modules/codec/cc.c

@@ -327,7 +327,7 @@ static subpicture_t *Subtitle( decoder_t *p_dec, char *psz_subtitle, char *psz_h
 
     subpicture_updater_sys_t *p_spu_sys = p_spu->updater.p_sys;
 
-    p_spu_sys->align = SUBPICTURE_ALIGN_BOTTOM;
+    p_spu_sys->align = SUBPICTURE_ALIGN_TOP | SUBPICTURE_ALIGN_LEFT;
     p_spu_sys->text  = psz_subtitle;
     p_spu_sys->html  = psz_html;