Oh, no. It's legal to have 0 bytes read. Just not -1. If *that* happens,

I want to see a core.  0 bytes reads are fine.  Grr.

(I'm so tempted to throw this assert out, but if we get -1 length
brigades back, we're gonna be screwed.)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93202 13f79535-47bb-0310-9956-ffa450edef68