iSAC fix entropy coder: Recently added DCHECK could in fact trigger

webrtc/common_audio/signal_processing/include/spl_inl.h

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 45 matching lines @@
 // Returns the number of leading zero bits in the argument.
 static __inline int WebRtcSpl_CountLeadingZeros64(uint64_t n) {
 #ifdef __GNUC__
   COMPILE_ASSERT(sizeof(unsigned long long) == sizeof(uint64_t));  // NOLINT
   return n == 0 ? 64 : __builtin_clzll(n);
 #else
   return WebRtcSpl_CountLeadingZeros64_NotBuiltin(n);
 #endif
 }
 
+static __inline int32_t WebRtcSpl_SatW64ToW32(int64_t x) {
+  int32_t x32 = (int32_t)x;
+  return x32 == x ? x32 : x < 0 ? INT32_MIN : INT32_MAX;
+}
+
 #ifdef WEBRTC_ARCH_ARM_V7
 #include "webrtc/common_audio/signal_processing/include/spl_inl_armv7.h"
 #else
 
 #if defined(MIPS32_LE)
 #include "webrtc/common_audio/signal_processing/include/spl_inl_mips.h"
 #endif
 
 #if !defined(MIPS_DSP_R1_LE)
 static __inline int16_t WebRtcSpl_SatW32ToW16(int32_t value32) {
@@ skipping 69 matching lines @@
 }
 
 static __inline int32_t WebRtc_MulAccumW16(int16_t a, int16_t b, int32_t c) {
   return (a * b + c);
 }
 #endif  // #if !defined(MIPS32_LE)
 
 #endif  // WEBRTC_ARCH_ARM_V7
 
 #endif  // WEBRTC_COMMON_AUDIO_SIGNAL_PROCESSING_INCLUDE_SPL_INL_H_