FATE: add bitexact sws flags to the fieldorder test

swscale is called for the 420 to 422 conversion
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

tests/fate/filter-video.mak

@@ -22,7 +22,7 @@ FATE_FILTER_VSYNTH-$(CONFIG_FADE_FILTER) += fate-filter-fade
 fate-filter-fade: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf fade=in:0:25,fade=out:25:25
 
 FATE_FILTER_VSYNTH-$(call ALLYES, INTERLACE_FILTER FIELDORDER_FILTER) += fate-filter-fieldorder
-fate-filter-fieldorder: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf interlace=tff,fieldorder=bff
+fate-filter-fieldorder: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf interlace=tff,fieldorder=bff -sws_flags +accurate_rnd+bitexact
 
 FATE_FILTER_VSYNTH-$(CONFIG_GRADFUN_FILTER) += fate-filter-gradfun
 fate-filter-gradfun: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf gradfun

tests/ref/fate/filter-fieldorder

 #tb 0: 2/25
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