tiffdec: PIX_FMT_GRAY16LE support

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/tiff.c

@@ -323,7 +323,7 @@ static int init_image(TiffContext *s)
         s->avctx->pix_fmt = PIX_FMT_RGB24;
         break;
     case 161:
-        s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
+        s->avctx->pix_fmt = s->le ? PIX_FMT_GRAY16LE : PIX_FMT_GRAY16BE;
         break;
     case 162:
         s->avctx->pix_fmt = PIX_FMT_GRAY8A;