AudioDecoderIsacT: Require caller to always specify sample rate

webrtc/test/fuzzers/audio_decoder_isacfix_fuzzer.cc

Index: webrtc/test/fuzzers/audio_decoder_isacfix_fuzzer.cc
diff --git a/webrtc/test/fuzzers/audio_decoder_isacfix_fuzzer.cc b/webrtc/test/fuzzers/audio_decoder_isacfix_fuzzer.cc
index c930aa8fba10a7a4da70b977806e2093d3815ace..25ab3f454ded804a2908204440f3e7dd8d8daa91 100644
--- a/webrtc/test/fuzzers/audio_decoder_isacfix_fuzzer.cc
+++ b/webrtc/test/fuzzers/audio_decoder_isacfix_fuzzer.cc
@@ -13,10 +13,10 @@
 
 namespace webrtc {
 void FuzzOneInput(const uint8_t* data, size_t size) {
-  AudioDecoderIsacFix dec(nullptr);
   static const int kSampleRateHz = 16000;
   static const size_t kAllocatedOuputSizeSamples = 16000 / 10;  // 100 ms.
   int16_t output[kAllocatedOuputSizeSamples];
+  AudioDecoderIsacFix dec(kSampleRateHz);
   FuzzAudioDecoder(DecoderFunctionType::kNormalDecode, data, size, &dec,
                    kSampleRateHz, sizeof(output), output);
 }