Fix NewStringRangeError failure due to failing malloc.

test/cctest/test-api.cc

 // Copyright 2012 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 21905 matching lines @@
 }
 
 
 TEST(NewStringRangeError) {
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope handle_scope(isolate);
   LocalContext env;
   const int length = i::String::kMaxLength + 1;
   const int buffer_size = length * sizeof(uint16_t);
   void* buffer = malloc(buffer_size);
+  if (buffer == NULL) return;
   memset(buffer, 'A', buffer_size);
   {
     v8::TryCatch try_catch;
     char* data = reinterpret_cast<char*>(buffer);
     CHECK(v8::String::NewFromUtf8(isolate, data, v8::String::kNormalString,
                                   length).IsEmpty());
     CHECK(try_catch.HasCaught());
   }
   {
     v8::TryCatch try_catch;
     uint8_t* data = reinterpret_cast<uint8_t*>(buffer);
     CHECK(v8::String::NewFromOneByte(isolate, data, v8::String::kNormalString,
                                      length).IsEmpty());
     CHECK(try_catch.HasCaught());
   }
   {
     v8::TryCatch try_catch;
     uint16_t* data = reinterpret_cast<uint16_t*>(buffer);
     CHECK(v8::String::NewFromTwoByte(isolate, data, v8::String::kNormalString,
                                      length).IsEmpty());
     CHECK(try_catch.HasCaught());
   }
   free(buffer);
 }