Fix a possible crash on windows.

src/shared/platform/win/time_win.cc

 /*
  * Copyright (c) 2011 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 // Make sure that winmm.lib is added to the linker's input.
 #pragma comment(lib, "winmm.lib")
 #include "native_client/src/include/portability.h"
@@ skipping 95 matching lines @@
   FILETIME ft;
   if (is_local)
     success = FileTimeToLocalFileTime(&utc_ft, &ft);
   else
     ft = utc_ft;
 
   // FILETIME in SYSTEMTIME (exploded).
   SYSTEMTIME st;
   if (!success || !FileTimeToSystemTime(&ft, &st)) {
     // NOTREACHED() << "Unable to convert time, don't know why";
-    ZeroMemory(exploded, sizeof(exploded));
+    ZeroMemory(exploded, sizeof(*exploded));
     return;
   }
 
   exploded->year = st.wYear;
   exploded->month = st.wMonth;
   exploded->day_of_week = st.wDayOfWeek;
   exploded->day_of_month = st.wDay;
   exploded->hour = st.wHour;
   exploded->minute = st.wMinute;
   exploded->second = st.wSecond;
@@ skipping 88 matching lines @@
     if (!QueryPerformanceFrequency(&ticks_per_sec))
       return TimeTicks(0);  // Broken, we don't guarantee this function works.
     ticks_per_microsecond =
         ticks_per_sec.QuadPart / Time::kMicrosecondsPerSecond;
   }
 
   LARGE_INTEGER now;
   QueryPerformanceCounter(&now);
   return TimeTicks(now.QuadPart / ticks_per_microsecond);
 }