warning C4267: conversion from 'size_t' to 'unsigned long'

Change-Id: I1d922e5b3c7959022b6f57c33b9a4976a16305f6

shell/source/win32/shlxthandler/ooofilt/stream_helper.cxx

@@ -127,7 +127,7 @@ FileStream::~FileStream()
 unsigned long FileStream::sread (unsigned char *buf, unsigned long size)
 {
     if (file)
-        return fread(buf, 1, size, file);
+        return static_cast<unsigned long>(fread(buf, 1, size, file));
     return 0;
 }