fix uninitialized variable

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 197 matching lines @@
       reinterpret_cast<uintptr_t>(descriptor.compare_value);
   uintptr_t value = *CheckedCast<uintptr_t>(ptr);
   return heap->ToBoolean(compare_value == value);
 }
 
 
 static MaybeObject* GetPrimitiveValue(
     const PrimitiveValueDescriptor& descriptor,
     char* ptr,
     Heap* heap) {
-  int32_t int32_value;
+  int32_t int32_value = 0;
   switch (descriptor.data_type) {
     case kDescriptorInt8Type:
       int32_value = *CheckedCast<int8_t>(ptr);
       break;
     case kDescriptorUint8Type:
       int32_value = *CheckedCast<uint8_t>(ptr);
       break;
     case kDescriptorInt16Type:
       int32_value = *CheckedCast<int16_t>(ptr);
       break;
@@ skipping 14066 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal