Composer not loading from php include dir

Interesting wording using "should". Does that imply it has to be 5.2.4?

Would it be ok to add a pull request like either of the following or are cross-version workarounds frowned upon?

PHP Code:

if ($composer_autoload === TRUE)
{
 ...
}
elseif (file_exists($composer_autoload) || 
    (function_exists("stream_resolve_include_path") && stream_resolve_include_path($composer_autoload)))
{
 ...
}
else{
 ...
} 


or 

PHP Code:

if ($composer_autoload === TRUE)
{
...
}
elseif (file_exists($composer_autoload))
{
...
}
elseif (function_exists("stream_resolve_include_path") && stream_resolve_include_path($composer_autoload)))
{
 ...
}
else
{
...
} 


PS, where is the requirements page linked from in the docs? Couldn't see it linked from any of the Instalation instruction pages.