One of 2 fixes to quell a compiler warning. According to fanf@apache.org

> Before C99 the correct way to print a size_t is to use %lu, since
> long was guaranteed to be the widest integral type, so redoing the
> fix on that basis would be better. However with C99 size_t can be
> as wide as unsigned long long so you need to use that format to
> be safe, but then you compromise portability.

So options; simply cast to (int) as I know the value is small; use %lu
without a cast - but get warnings later on >C99. Or kind of the compromize
below; do %lu but cast to be sure.

Feel free to patch in a better fix !

Dw

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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@91360 13f79535-47bb-0310-9956-ffa450edef68