run-tests: fix _checkhglib() so it's correct when using --with-hg.
Since this makes the warning less likely, upgrade it to a "real"
warning to stderr.
% Set up the repo
adding a1/a2/a3/a4/foo
adding b1/b2/b3/b4/foo
adding b1/b2/c3/c4/foo
adding d1/d2/d3/d4/foo
adding d1/d2/foo
% manifest with descending
200 Script output follows
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
<head>
<link rel="icon" href="/static/hgicon.png" type="image/png" />
<meta name="robots" content="index, nofollow" />
<link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
<title>test: 9087c84a0f5d /</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://www.selenic.com/mercurial/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/9087c84a0f5d">log</a></li>
<li><a href="/graph/9087c84a0f5d">graph</a></li>
<li><a href="/tags">tags</a></li>
<li><a href="/branches">branches</a></li>
</ul>
<ul>
<li><a href="/rev/9087c84a0f5d">changeset</a></li>
<li class="active">browse</li>
</ul>
<ul>
</ul>
</div>
<div class="main">
<h2><a href="/">test</a></h2>
<h3>directory / @ 0:9087c84a0f5d <span class="tag">tip</span> </h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<table class="bigtable">
<tr>
<th class="name">name</th>
<th class="size">size</th>
<th class="permissions">permissions</th>
</tr>
<tr class="fileline parity0">
<td class="name"><a href="/file/9087c84a0f5d/">[up]</a></td>
<td class="size"></td>
<td class="permissions">drwxr-xr-x</td>
</tr>
<tr class="fileline parity1">
<td class="name">
<a href="/file/9087c84a0f5d/a1">
<img src="/static/coal-folder.png" alt="dir."/> a1/
</a>
<a href="/file/9087c84a0f5d/a1/a2/a3/a4">
a2/a3/a4
</a>
</td>
<td class="size"></td>
<td class="permissions">drwxr-xr-x</td>
</tr>
<tr class="fileline parity0">
<td class="name">
<a href="/file/9087c84a0f5d/b1">
<img src="/static/coal-folder.png" alt="dir."/> b1/
</a>
<a href="/file/9087c84a0f5d/b1/b2">
b2
</a>
</td>
<td class="size"></td>
<td class="permissions">drwxr-xr-x</td>
</tr>
<tr class="fileline parity1">
<td class="name">
<a href="/file/9087c84a0f5d/d1">
<img src="/static/coal-folder.png" alt="dir."/> d1/
</a>
<a href="/file/9087c84a0f5d/d1/d2">
d2
</a>
</td>
<td class="size"></td>
<td class="permissions">drwxr-xr-x</td>
</tr>
</table>
</div>
</div>
</body>
</html>
% ERRORS ENCOUNTERED