tools/target_dec_fuzzer: Adjust threshold for CSCD

Fixes: Timeout
Fixes: 63362/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CSCD_fuzzer-4694620065628160

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c2f2bf82c1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

tools/target_dec_fuzzer.c

@@ -221,6 +221,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_CFHD:        maxpixels  /= 16384; break;
     case AV_CODEC_ID_CINEPAK:     maxpixels  /= 128;   break;
     case AV_CODEC_ID_COOK:        maxsamples /= 1<<20; break;
+    case AV_CODEC_ID_CSCD:        maxpixels  /= 1024;  break;
     case AV_CODEC_ID_DFA:         maxpixels  /= 1024;  break;
     case AV_CODEC_ID_DIRAC:       maxpixels  /= 8192;  break;
     case AV_CODEC_ID_DSICINVIDEO: maxpixels  /= 1024;  break;