avcodec/hevc: drop redundant ifs()

Found-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/hevc.c

@@ -335,9 +335,7 @@ static int set_sps(HEVCContext *s, const HEVCSPS *sps)
     ff_videodsp_init (&s->vdsp,    sps->bit_depth);
 
     for (i = 0; i < 3; i++) {
-        if (s->sao_pixel_buffer_h[i])
         av_freep(&s->sao_pixel_buffer_h[i]);
-        if (s->sao_pixel_buffer_v[i])
         av_freep(&s->sao_pixel_buffer_v[i]);
     }