Fixed _realpath() for UNC pathes like '\\examplepath\mypath' (will be…

…come '//examplepath/mypath'). See #1.

Here is a comparison between the output of the old and new version of _realpath():

Input: '/a/b/c/' Output old: '/a/b/c/' Output new: '/a/b/c'
Input: '//a/b/c' Output old: '/a/b/c'  Output new: '//a/b/c'
Input: 'a//b'    Output old: 'a/b'     Output new: 'a//b'

syntax.php

@@ -886,8 +886,8 @@ function _realpath($path) {
         $path=explode('/', $path);
         $output=array();
         for ($i=0; $i<sizeof($path); $i++) {
-            if (('' == $path[$i] && $i > 0) || '.' == $path[$i]) continue;
-            if ('..' == $path[$i] && $i > 0 && '..' != $output[sizeof($output) - 1]) {
+            if ('.' == $path[$i]) continue;
+            if ('..' == $path[$i] && '..' != $output[sizeof($output) - 1]) {
                 array_pop($output);
                 continue;
             }