Coverity fix: Dereference after null check

ppapi/native_client/src/trusted/plugin/pnacl_streaming_translate_thread.cc

Index: ppapi/native_client/src/trusted/plugin/pnacl_streaming_translate_thread.cc
diff --git a/ppapi/native_client/src/trusted/plugin/pnacl_streaming_translate_thread.cc b/ppapi/native_client/src/trusted/plugin/pnacl_streaming_translate_thread.cc
index f8c79fafcc7f7cb3dd3413a42b6c627e9c73047f..b87580a0bd66870c61232a592df6c113e3f9da23 100644
--- a/ppapi/native_client/src/trusted/plugin/pnacl_streaming_translate_thread.cc
+++ b/ppapi/native_client/src/trusted/plugin/pnacl_streaming_translate_thread.cc
@@ -67,7 +67,7 @@ void PnaclStreamingTranslateThread::PutBytes(std::vector<char>* bytes,
     bytes->resize(count);
   }
   NaClXMutexLock(&cond_mu_);
-  if (count == PP_OK || count < 0) {
+  if (count == PP_OK || count < 0 || bytes == NULL) {
     done_ = true;
   } else {
     data_buffers_.push_back(std::vector<char>());