Bug 619685 unused variable dataSize in nsDiskCacheStreamIO::FlushBufferToFile

r=jduell

netwerk/cache/nsDiskCacheStreams.cpp

@@ -757,9 +757,9 @@ nsDiskCacheStreamIO::FlushBufferToFile()
         rv = OpenCacheFile(PR_RDWR | PR_CREATE_FILE, &mFD);
         if (NS_FAILED(rv))  return rv;
 
+#if 0
         PRInt64 dataSize = mBinding->mCacheEntry->PredictedDataSize();
 // Appears to cause bug 617123?  Disabled for now.
-#if 0
         if (dataSize != -1)
             mozilla::fallocate(mFD, PR_MIN(dataSize, kPreallocateLimit));
 #endif