mosaic.c: If we're not using bluescreen stuff (which needs per pixel alpha...

mosaic.c: If we're not using bluescreen stuff (which needs per pixel alpha values), then use I420 instead of YUVA when resizing the images. (see previous commit for explanation.)

modules/video_filter/mosaic.c

@@ -615,7 +615,10 @@ static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
             fmt_in.i_height = p_es->p_picture->format.i_height;
             fmt_in.i_width = p_es->p_picture->format.i_width;
 
+            if( p_sys->b_bs )
                 fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
+            else
+                fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
             fmt_out.i_width = col_inner_width;
             fmt_out.i_height = row_inner_height;