initialize cpu flags to fix compile error on windows

source/cpu_id.cc

 /*
  *  Copyright 2011 The LibYuv 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 179 matching lines @@
   return LIBYUV_FALSE;
 }
 #else  // nacl does not support getenv().
 static LIBYUV_BOOL TestEnv(const char*) {
   return LIBYUV_FALSE;
 }
 #endif
 
 LIBYUV_API SAFEBUFFERS
 int InitCpuFlags(void) {
-  int cpu_info;
+  // TODO(fbarchard): swap kCpuInit logic so 0 means uninitialized.
+  int cpu_info = 0;
 #if !defined(__pnacl__) && !defined(__CLR_VER) && defined(CPU_X86)
   uint32 cpu_info0[4] = { 0, 0, 0, 0 };
   uint32 cpu_info1[4] = { 0, 0, 0, 0 };
   uint32 cpu_info7[4] = { 0, 0, 0, 0 };
   CpuId(0, 0, cpu_info0);
   CpuId(1, 0, cpu_info1);
   if (cpu_info0[0] >= 7) {
     CpuId(7, 0, cpu_info7);
   }
   cpu_info = ((cpu_info1[3] & 0x04000000) ? kCpuHasSSE2 : 0) |
@@ skipping 86 matching lines @@
 // Note that use of this function is not thread safe.
 LIBYUV_API
 void MaskCpuFlags(int enable_flags) {
   cpu_info_ = InitCpuFlags() & enable_flags;
 }
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif