lavfi/drawutils: move BE check out of loop

libavfilter/drawutils.c

@@ -89,6 +89,8 @@ int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
 
     if (!desc || !desc->name)
         return AVERROR(EINVAL);
+    if (desc->flags & AV_PIX_FMT_FLAG_BE)
+        return AVERROR(ENOSYS);
     if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_ALPHA))
         return AVERROR(ENOSYS);
     if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE || format == AV_PIX_FMT_P016LE || format == AV_PIX_FMT_P016BE)
@@ -101,8 +103,6 @@ int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
         /* for now, only 8-16 bits formats */
         if (c->depth < 8 || c->depth > 16)
             return AVERROR(ENOSYS);
-        if (desc->flags & AV_PIX_FMT_FLAG_BE)
-            return AVERROR(ENOSYS);
         if (c->plane >= MAX_PLANES)
             return AVERROR(ENOSYS);
         /* strange interleaving */