Absolutely namespaced classes not properly detected with class_exists()

[cmb69]

Consider the following script:

<?php

if (class_exists('\Normalizer')) {
    \Normalizer::normalize('foo');
}

Running phpcompatinfo analyser:run . (PHAR version 4.1.0), I get the following (partial) output:

    Class       Matches REF  EXT min/Max PHP min/Max PHP all
    Normalizer  1       intl 1.0.0beta   5.3.0alpha1
 CU \Normalizer         user             5.3.0

I would expect, however, something like:

    Class      Matches REF  EXT min/Max PHP min/Max PHP all
 C  Normalizer 1       intl 1.0.0beta   5.3.0alpha1

This is, by the way, the result I'm getting when omitting the leading backslash from both class names in the script.

[llaville]

As explained in #194, the intl reference with missing methods is not yet able to detect the right version for \Normalizer::normalize('foo').
I must document it before to check other fixes !

[llaville]

Thanks Christoph for your report. It will allow me to improve again conditional code detection.

When a class is detected previously as optional, all methods are also tagged as optional to avoid bad total requirements