h264: Only initialize dsputil if error resilience is enabled

It is only used for error resilience. This allows building the
h264 decoder without dsputil, if error resilience is disabled.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/h264.c

@@ -1440,7 +1440,8 @@ av_cold int ff_h264_decode_init(AVCodecContext *avctx)
     h->dequant_coeff_pps = -1;
 
     /* needed so that IDCT permutation is known early */
-    ff_dsputil_init(&h->dsp, h->avctx);
+    if (CONFIG_ERROR_RESILIENCE)
+        ff_dsputil_init(&h->dsp, h->avctx);
     ff_videodsp_init(&h->vdsp, 8);
 
     memset(h->pps.scaling_matrix4, 16, 6 * 16 * sizeof(uint8_t));
@@ -2915,7 +2916,8 @@ static int h264_set_parameter_from_sps(H264Context *h)
             ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
                               h->sps.chroma_format_idc);
             h->dsp.dct_bits = h->sps.bit_depth_luma > 8 ? 32 : 16;
-            ff_dsputil_init(&h->dsp, h->avctx);
+            if (CONFIG_ERROR_RESILIENCE)
+                ff_dsputil_init(&h->dsp, h->avctx);
             ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);
         } else {
             av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n",